CN1720455A - 基于膜的测定装置中钩效应的减小 - Google Patents

基于膜的测定装置中钩效应的减小 Download PDF

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CN1720455A
CN1720455A CNA2003801052766A CN200380105276A CN1720455A CN 1720455 A CN1720455 A CN 1720455A CN A2003801052766 A CNA2003801052766 A CN A2003801052766A CN 200380105276 A CN200380105276 A CN 200380105276A CN 1720455 A CN1720455 A CN 1720455A
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卫宁
黄延宾
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Abstract

本发明提供了一种用于检测测试样品中分析物的存在或数量的基于膜的测定装置。该装置采用其上具有多个微孔颗粒的层析区。层析区能够以简单、有效和相对廉价的方式有效减小“钩效应”。尤其是,多个微孔颗粒使得较大尺寸的分析物/探针复合物在未复合的分析物之前到达检测区。由于基本上抑制了未复合的分析物与复合物竞争检测区中的结合位点,因此可限制“假阴性”的发生,甚至在分析物浓度较高的时候。

Description

基于膜的测定装置中钩效应的减小
                         发明背景
多种不同的分析方法和设备普遍用于流通测定中,用于确定测试样品中可能存在的分析物的存在和/或浓度。例如,免疫测定法利用免疫系统机制,其中抗体是响应作为有机体的病原或外源的抗原的存在而产生的。这些抗体和抗原即免疫反应物能够彼此结合,借此产生能够用来确定生物样品中特定抗原的存在或浓度的高度特异性反应机制。
有几种公知的免疫测定法,这些方法利用由可检测的成分标记的免疫反应物,从而能够对分析物进行分析检测。例如,“夹心型”测定法一般涉及使测试样品与可检测的探针(例如染色乳胶或放射性同位素)混合,这些探针与分析物的特异性结合部分缀合。缀合探针(conjugated probes)与分析物形成复合物。这些复合物然后到达固定抗体区,在此处抗体与分析物之间发生结合,从而形成三元的“夹心复合物”。夹心复合物位于用于检测分析物的区域。此技术用来获得定量或半定量结果。这些夹心型测定的一些实例在 Grubb等人的U.S.4,168,146和 Tom等人的U.S.4,366,241中有所描述。
然而,许多传统的“夹心型”测定形式在暴露到较高的分析物浓度时都遇到明显不准确的问题。具体地说,当分析物以高浓度存在时,测定样品中的大部分分析物不与缀合探针形成复合物。这样,未复合的分析物在到达检测区之后,就与复合的分析物竞争结合位点。由于未复合的分析物没有用探针标记,因此不能检测到。据此,如果相当大量的结合位点都被未复合的分析物所占据,那么测定就可表现出“假阴性”。该问题被普遍称作“钩效应(hook effect)”
已经提出多种用于减小免疫测定中的“钩效应”的技术。例如,Neumann等人的U.S.6,184,042中描述了一种用于减小夹心测定中的钩效应的技术。该技术涉及在带有至少两种能够结合分析物的受体的固相存在下培养分析物。第一受体是选自抗体、抗体片段及其混合物的结合分子的低聚体。第二受体结合或能够结合到固相上。可溶性低聚抗体的使用据说能够减小“钩效应”。
然而,对以简单、有效和相对廉价的方式来减小“钩效应”的改进技术,仍然存在需求。
                         发明概述
按照本发明的一个实施方案,公开了一种用于检测测试样品中分析物的存在或数量的流通测定装置。这种流通测定装置包括与能够产生检测信号的缀合检测探针相通的多孔膜。此多孔膜限定出层析区,在层析区内固定有多个微孔颗粒。这些微孔颗粒能够在相互之间限定出多个空间,这些空间的平均尺寸大于微孔的平均尺寸。在一些实施方案中,微孔的平均尺寸比空间的平均尺寸至少小约100%,而在一些实施方案中,至少小约150%,在一些实施方案中,至少小约250%。微孔颗粒可选自聚苯乙烯、聚丙烯酰胺、聚丙烯腈;硅珠、以及这些物质的组合,并且其表面对于分析物可以是化学惰性的。
多孔膜还限定出位于层析区上游的检测区。捕获试剂固定在检测区内,该试剂被构造成能够结合到缀合检测探针上。在检测区内,缀合检测探针能够产生检测信号,其中由所述检测信号来确定测试样品内分析物的量。
按照本发明的另一个实施方案,公开了一种用于检测测试样品中分析物的存在或含量的流通夹心测定装置。这种测定装置包括与能够产生检测信号的缀合检测探针相通的多孔膜。缀合检测探针被构造成在与测试样品中的分析物接触时能够与其结合,从而形成分析物/探针复合物和未复合的分析物。多孔膜限定出层析区,在层析区内固定有众多微孔颗粒。这些微孔颗粒被构造成使未复合的分析物以比分析物/探针复合物慢的速率流过层析区。多孔膜还包括位于层析区下游的检测区。捕获试剂固定在检测区内,所述捕获试剂被构造成能够结合到分析物/探针复合物上,从而复合物在检测区内产生检测信号,其中由检测信号来确定测试样品内分析物的量。
本发明公开了一种用于检测测试样品中分析物的存在或数量的方法。该方法包括:
i)提供一种流通测定装置,该装置包括与能够产生检测信号的缀合检测探针相通的多孔膜,此多孔膜限定出层析区和位于层析区下游的检测区,在层析区内固定有多个微孔颗粒,其中捕获试剂固定在检测区内;
ii)使含有分析物的测试样品与缀合检测探针接触,从而形成分析物/探针复合物和未复合的分析物;以及
iii)使分析物/探针复合物和未复合的分析物到达层析区,然后到达检测区,其中分析物/探针复合物在未复合的分析物之前到达检测区。
下面更详细地论述本发明的其它特征和方面。
                         附图简述
本发明的全面和可实施的公开内容,包括其最佳方式,针对本领域的普通技术人员,都参照附图在说明书的剩余部分得到更加具体的阐述,其中:
图1是本发明的流通测定装置的一个实施方案的透视图;
图2图示出将抗体共价缀合到羧基化纳米颗粒上的一个实施方案;
图3是本发明的流通测定装置的一个实施方案的示意图,是在未复合的分析物穿过层析区之前示出的;
图4是图3的实施方案的示意图,是在未复合的分析物穿过层析区之后示出的;
图5是图1所示层析区的分解图。
附图标记在本说明书和附图中的重复使用意味着其代表本发明的相同或类似特征或部件。
                     代表性实施方案详述
                           定义
正如本文所用的,术语“分析物”通常是指待检测的物质。例如,分析物可包括抗原性物质、半抗原、抗体以及这些物质的组合。分析物包括但不限于毒素、有机化合物、蛋白质、肽、微生物、氨基酸、核酸、激素、类固醇、维生素、药物(包括那些为了治疗目的而施用的药物和那些为了违法目的而施用的药物)、药物中间体或副产物、细菌、病毒颗粒以及任何上述物质的代谢物或抗体。一些分析物的具体实例包括铁蛋白;肌酸激酶MIB(CK-MB);地高辛;苯妥英;苯巴比妥;卡马西平;万古霉素;庆大霉素;茶碱;丙戊酸;奎尼定;促黄体生成激素(LH);促卵泡激素(FSH);雌二醇、黄体酮;C-反应蛋白;lipocalins;IgE抗体;维生素B2微球蛋白;糖化血红蛋白(Gly、Hb);氢化可的松;毛地黄毒苷;N-乙酰普鲁卡因酰胺(NAPA);普鲁卡因酰胺;风疹抗体,例如风疹-IgG和风疹IgM;毒胞质抗体,例如毒胞质IgG(Toxo-IgG)和毒胞质IgM(Toxo-IgM);睾酮;水杨酸盐;乙酰氨基苯酚;乙肝病毒表面抗原(HBsAg);乙肝核心抗原的抗体,例如抗-乙肝核心抗原IgG和IgM(抗-HBC);人免疫缺陷病毒1和2(HIV1和2);人T-细胞白血病病毒1和2(HTLV);乙肝e抗原(HBeAg);乙肝e抗原的抗体(抗-HBe);促甲状腺素(TSH);甲状腺素(T4);全三碘甲状腺原氨酸(全T3);游离三碘甲状腺原氨酸(游离T3);癌胚抗原(CEA);以及α-胎儿蛋白(AFP)。滥用和受控物质的药物包括但不限于麻黄碱;脱氧麻黄碱;巴比妥酸盐,例如异戊巴比妥、司可巴比妥、戊巴比妥、苯巴比妥和巴比妥;苯二氮杂类,例如利眠宁和安定;大麻素类,例如印度大麻和大麻;可卡因;芬太尼;LSD;安眠酮;鸦片制剂,例如海洛因、吗啡、可待因、盐酸二氢吗啡酮、氢可酮、美沙酮、氧可酮、氧吗啡酮和鸦片;苯环利定;和丙氧吩。其它潜在的分析物在 Everhart等人的U.S.6,436,651和 Tom等人的U.S.4,366,241中有所描述。
本文所用术语“测试样品”通常是指被怀疑含有分析物的材料。测试样品可从源体获得后直接使用,或者进行预处理以改善样品的特性。测试样品可来自任何生物源,例如生理流体,包括血液、间质液、唾液、眼晶状体液、脑脊髓液、汗液、尿液、乳液、腹水、raucous、滑液、腹膜液、阴道液、羊膜液等。测试样品在使用前可预处理,例如用血液制备血浆、稀释粘稠液等。处理方法包括过滤、沉淀、稀释、蒸馏、浓缩、干扰成分的灭活、以及试剂的加入。除了生理流体之外,还可以使用其它液态样品,例如用于环境或食品生产性能测定的水、食品等。此外,被怀疑含有分析物的固体材料也可用作测试样品。在一些情况下,有益的是,改善固体测试样品以形成液态介质或释放分析物。
                         详细描述
现在详细参照本发明的多个不同实施方案,其中的一个或多个实例在以下列出。每个实例都是为了解释本发明,而对本发明没有限定作用。事实上,对于本领域技术人员显而易见的是,在不脱离本发明的范围或精髓的情况下能够对本发明作出多种修改和变型。例如,作为实施方案的一部分而阐述或描述的特征可用在另一个实施方案上,从而产生又一个实施方案。于是,本发明意在覆盖这样的修改和变型,即它们在所附的权利要求书及其等同物的范围内。
总体上,本发明涉及一种用于检测测试样品中分析物的存在或数量的基于膜的测定装置。该装置采用层析区,多个微孔颗粒位于层析区上。层析区能够以简单、有效和相对廉价的方式有效减小“钩效应”。尤其是,众多微孔颗粒允许大尺寸的分析物/探针复合物在未复合的分析物之前到达检测区。由于基本上抑制了未复合的分析物与复合物在检测区竞争结合位点,因此可以限制“假阴性”的发生,甚至在分析物的浓度较高的情况下。
例如,参照图1,现在更详细地描述按照本发明形成的流通测定装置20的一个实施方案。如图所示,装置20包含任选由刚性材料21支撑着的多孔膜23。通常,多孔膜23可以由测试样品能够通过的任何材料制成。例如,用来形成多孔膜23的材料可包括但不限于天然材料、合成材料、或者天然存在的被合成改性的材料,例如多糖(诸如纸和纤维素衍生物之类的纤维素材料,例如醋酸纤维素和硝基纤维素);聚醚砜;尼龙膜;硅石;均匀分散在多孔聚合物基质中的无机材料,例如去活氧化铝、硅藻土、MgSO4或其它无机精细材料,其中聚合物为例如氯乙烯、氯乙烯-丙烯共聚物和氯乙烯-醋酸乙烯酯共聚物;布,包括天然存在的(例如棉花)及合成的(例如尼龙或人造纤维);多孔凝胶,例如硅胶、琼脂糖、右旋糖苷和明胶;聚合物膜,例如聚丙烯酰胺等等。在一个特定实施方案中,多孔膜23是由硝基纤维素和/或聚酯砜材料形成的。应该理解,术语“硝基纤维素”是指纤维素的硝酸酯,其可以是单独的硝基纤维素,或者是硝酸与其它酸(例如具有1-7个碳原子的脂肪族羧酸)的混合酯。
装置20还可以包含芯吸(wicking)垫28。芯吸垫28通常接收已经通过整个多孔膜23迁移的流体。正如本领域内所公知的,芯吸垫28有助于促进毛细作用和通过膜23的流体流动。
为了在测试样品内启动分析物的检测,使用者可直接将测试样品加入到一部分多孔膜23上,然后样品可通过膜23移动。或者是,测试样品可以先加到与多孔膜23以流体相通的取样垫(未示出)上。可用来形成取样垫的一些适宜材料包括但不限于硝基纤维素、纤维素、多孔聚乙烯垫和玻璃纤维滤纸。如果需要的话,取样垫还可含有扩散地或非扩散地附着到其上的一种或多种测定预处理试剂。
在图示的实施方案中,测试样品从取样垫(未示出)移动到以与取样垫一端相通的方式放置的缀合垫22上。缀合垫22由测试样品能够通过的材料形成。例如,在一个实施方案中,缀合垫22由玻璃纤维形成。虽然仅仅示出一个缀合垫22,但是应该理解,其它缀合垫也可用于本发明。
为了易于准确检测测试样品内分析物的存在或缺乏,将探针施加在装置20的多个不同部位。如以下更详细描述的,探针可用于分析物的检测和校正。通常能够产生可目视检测或通过仪器设备检测的信号的任何物质都可以用作探针。各种合适的物质包括发色团;催化剂;荧光化合物;化学发光化合物;磷光化合物;放射性化合物;直接目视标记物,包括胶状金属(例如金)和非金属颗粒、染料颗粒、酶或底物、或有机聚合物胶乳颗粒;脂质体或含有信号生成物的其它囊泡等等。例如,适合用作探针的一些酶公开在Litman等人的U.S.4,275,149中,该文献在此作为参考全部引入本文。酶/底物系统的一个实例是酶碱性磷酸酶和底物硝基蓝四唑-5-溴-4-氯-3-吲哚基磷酸盐、或者这些物质的衍生物或类似物、或者底物4-甲基伞形基(umbelliferyl)-磷酸盐。其它合适的探针在Jou等人的U.S.5,670,381和Tarcha等人的U.S.5,252,459中有所描述,这些文献在此作为参考全部引入本文。
在一些实施方案中,探针可含有产生可检测信号的荧光化合物。荧光化合物可以是荧光分子、聚合物、树枝状物质、颗粒等等。合适荧光分子的一些实例例如包括但不限于荧光素、铕螯合物、藻胆蛋白质、若丹明以及这些物质的衍生物和类似物。可目视检测的有色化合物也能够用作探针,借此在无需其它信号生成试剂的情况下,提供了样品中分析物的存在或浓度的直接有色读数。
探针,诸如如上所述的探针,可单独使用或与微粒(有时称作“珠”或“微珠”)结合使用。例如,可使用天然存在的微粒,例如晶核、支原体、质粒、质体、哺乳动物细胞(例如红细胞血影)、单细胞微生物(例如细菌)、多糖(例如琼脂糖)等等。此外,还可采用合成微粒。例如,在一个实施方案中,采用用荧光染料或有色染料标记的胶乳微粒。虽然任何胶乳微粒都可用于本发明,但是胶乳微粒一般是由以下物质形成的:聚苯乙烯、丁二烯苯乙烯、苯乙烯-丙烯酸-乙烯基三元共聚物、聚甲基丙烯酸甲酯、聚甲基丙烯酸乙酯、苯乙烯-马来酐共聚物、聚醋酸乙烯酯、聚乙烯基吡啶、聚二乙烯基苯、聚对苯二甲酸丁二酯、丙烯腈、氯乙烯-丙烯酸酯等,或者这些物质的酐、羧基、氨基、羟基或酰肼衍生物。其它合适的微粒在Jou等人的U.S.5,670,381和Tarcha等人的U.S.5,252,459中有所描述,这些文献在此作为参考全部引入本文。一些商业上可购得的合适荧光颗粒的实例包括商品名为“FluoSphere”(Red580/605)和“TransfluoSphere”(543/620)、由Molecular Probes,Inc.出售的荧光羧基化微球,以及也是由Molecular Probes,Inc.出售的“Texas Red”和5-及6-羧基四甲基若丹明。商业上可购得的合适有色胶乳微粒的实例包括由Bang’s Laboratory,Inc.出售的羧基化胶乳珠。
在一些情况下,需要用一些方式来给探针改性,以便使探针能够更容易地结合到分析物上。在这样的情况下,探针用某些粘附到其上的特异性结合部分来改性,以形成缀合探针。特异性结合部分通常是指特异性结合对,即两个不同的分子,其中一个分子化学和/或物理结合到第二个分子上的一员。例如,免疫反应特异性结合部分可包括抗原、半抗原、适体(aptamers)、抗体和这些物质的复合物,包括那些通过DNA重组方法或肽合成而形成的物质。抗体可以是单克隆或多克隆抗体、重组蛋白质或其混合物或片段,以及抗体和其它特异性结合部分的混合物。这些抗体的制备细节和它们用作特异性结合部分的适宜性是本领域技术人员所公知的。其它常用的特异性结合对包括但不限于生物素和亲和素、糖类和凝集素、互补核苷酸序列(包括用于DNA杂交测定中的探针和捕获核酸序列,用于检测靶核酸序列)、互补肽序列(包括用重组方法形成的那些互补肽序列)、效应子和受体分子、激素和激素结合蛋白、酶辅因子和酶、酶抑制剂和酶等。此外,特异性结合对可包括作为原始特异性结合部分类似物的部分。例如,可使用分析物的衍生物或片段,即分析物-类似物,只要它具有至少一个与分析物共同的表位即可。
特异性结合部分一般可利用任何各种公知技术附着到探针上。例如,特异性结合部分对探针(例如微粒)的共价附着,可利用羧基、氨基、醛基、溴乙酰基、碘乙酰基、巯基、环氧基和其它反应性或连接性官能团以及残余的游离基和游离基阳离子来实现,通过这些基团可完成蛋白偶合反应。还可包括作为官能化共聚单体的表面官能团,因为微粒的表面可含有较高表面浓度的极性基团。此外,虽然微粒探针经常在合成之后官能化,在某些情况下例如为聚(苯硫酚),但是微粒能够与蛋白质直接共价连接,而无需进一步改性。例如,参照图2,该图表示出用于共价缀合探针的本发明的一个实施方案。如图所示,缀合的第一个步骤是,用碳二亚胺活化探针表面上的羧基。在第二个步骤中,活化的羧酸基团与抗体的氨基反应,从而形成酰胺键。活化和/或抗体偶合可发生在缓冲液中,例如磷酸盐缓冲的盐水(PBS)(例如pH为7.2)或2-(N-吗啉代)乙磺酸(MES)(例如pH为5.3)。如图所示,所获得的探针然后可例如用乙醇胺封闭,从而形成探针缀合物。除了共价键合之外,其它附着技术,例如物理吸附,也可用于本发明。
如上所示,测试样品中的一些分析物可以不用所需的方式复合到缀合探针上,尤其是当分析物以高浓度存在于测试样品中时。该未复合的分析物随后与复合的分析物在检测区31竞争捕获试剂(如下所述),借此对测定装置20的准确度具有不利影响。为了抵消该影响,多孔膜23包含层析区35,众多微孔颗粒50分布在层析区上。如图3-5所示,微孔颗粒50的存在允许层析区35作为“凝胶渗透”柱,较大的分子以比较小分子快的速率通过层析区35。具体地说,如图5所示,尺寸大于微孔颗粒50的微孔51的分子不能通过,由此被迫流过颗粒50之间的空间52,即通过膜23的孔(如方向箭头L2所示)。由于颗粒50的微孔51在颗粒结构内形成“曲折路径”(即具有复杂形状的路径),因此分子通过微孔51比通过颗粒50之间的空间52花费的时间要长。据此,当通过层析区35时,较大尺寸的分子首先出去。中间尺寸的分子根据其尺寸不同程度地渗透过微孔颗粒50。最后,非常小的分子流过颗粒50的微孔51(如方向箭头L1所示),并最终由此排出色谱区35。一般来说,分析物/探针复合物的尺寸大于未复合的分析物的尺寸。因此,复合物能够在未复合的分析物到达检测区31之前到达检测区31并与其上含有的捕获试剂结合。以这种方式,复合的与未复合的分析物之间的竞争得到抑制。
色谱区35一般提供一个明显不同的区域(例如,线、点等),尽管本发明肯定包含多个区域。例如,在图示的实施方案中,采用一条线。当采用这条线的时候,线宽通常是可变的。例如,在一些实施方案中,分析物流动方向L上的线宽为,从施加分析物的部位(例如缀合垫22)到检测区31所测总距离的约10%-约100%,并且在一些实施方案中,为约10%-约50%。而且,这条线可位于基本上垂直于测试样品通过装置20的流动的方向上。同样地,在一些实施方案中,这条线可位于基本上平行于测试样品通过装置20的流动的方向上。
用于给定测定中的合适微孔颗粒50的选择标准包括各种因素,例如感兴趣的分析物的性质、测试条件、所采用的探针性质等。一般,期望微孔颗粒50具有相对均匀的孔和粒径分布以及良好的机械和化学稳定性。此外,一般还期望,微孔颗粒50的表面对测定装置20的其它组件保持化学惰性。例如,微孔颗粒50的表面相对于分析物通常是化学惰性的。可用于本发明的微孔颗粒50的一些实例包括但不限于合成的聚合颗粒,例如聚苯乙烯(例如高度交联的聚苯乙烯)、聚丙烯酰胺、聚丙烯腈;硅珠等。一些适宜的合成微孔颗粒50的具体实例在诸如 Stoy的U.S.4,110,529; Ley等人的U.S.4,940,734;和 Gooke等人的U.S.5,314,923中有所描述,这些文献在此作为参考全部并入本文。在探针也是微孔颗粒的实施方案中,应该理解,层杆区35的微孔颗粒50可以与探针相同。
微孔颗粒50的平均直径通常可按需要来改变。例如,在一些实施方案中,颗粒50的平均直径可为约0.1-约1000微米,在一些实施方案中,为约0.1-约100微米,在一些实施方案中,为约1-约10微米。一般,颗粒50基本上是球形的(即珠),尽管包括但不限于板、棒、条、不规则形状等的其它形状也适用于本发明。正如本领域技术人员所领会的,颗粒50的成分、形状、尺寸和/或密度可广泛变化。
一般来说,颗粒50的微孔51的平均尺寸(即直径)小于由多孔膜23的孔52形成的颗粒50之间的空间。具体地说,微孔51的平均尺寸一般比上述空间的平均尺寸至少小约100%,在一些实施方案中,至少小约150%,在一些实施方案中,至少小约250%。例如,在一些实施方案中,微孔51具有小于约100纳米的平均尺寸,在一些实施方案中,为约5-约100纳米,在一些实施方案中,为约10-约60纳米。作为对照,多孔膜23的孔52一般具有大于约200纳米的平均尺寸,在一些实施方案中,为约200-约5000纳米,在一些实施方案中,为约200-约2500纳米。
测定装置20还可包含检测区31,在检测区31上固定有能够结合到缀合探针上的捕获试剂。例如,在一些实施方案中,捕获试剂可以是生物捕获试剂。这些生物捕获试剂在本领域内是公知的,并且可包括但不限于抗原、半抗原、抗体、蛋白A或G、亲和素、链霉亲和素、二级抗体、以及这些物质的复合物。在许多情况下,期望这些生物捕获试剂能够与探针上存在的特异性结合部分(例如抗体)结合。此外,还期望用各种非生物材料作为捕获试剂。例如,在一些实施方案中,捕获试剂可包括聚电解质。聚电解质可具有净的正或负电荷,以及通常为中性的净电荷。例如,具有净正电荷的聚电解质的一些合适实例包括但不限于聚赖氨酸(在商业上从Sigma-Aldrich Chemical Co.,Inc.of St.Louis,MO购得)、聚乙烯亚胺;环氧氯丙烷官能化的聚胺和/或聚酰胺型胺类,例如聚(二甲基胺-共-环氧氯丙烷);聚二烯丙基二甲基-氯化铵;阳离子纤维素衍生物,例如用季铵盐水溶性单体接枝的纤维素共聚物或纤维素衍生物等等。在一个特定实施方案中,可采用作为含有季铵盐水溶性单体的纤维素衍生物的CelQuatSC-230M或H-100(从National Starch&Chemical,Inc.购得)。此外,具有净负电荷的聚电解质的一些适宜实例包括但不限于聚丙烯酸,例如聚(乙烯-共-甲基丙烯酸,钠盐)等等。还应该理解,其它聚电解质也可使用,例如两亲聚电解质(即具有极性和非极性部分)。例如,合适的两亲聚电解质的一些实例包括但不限于聚(苯乙烯基-b-N-甲基2-乙烯基碘化吡啶鎓)和聚(苯乙烯基-b-丙烯酸),它们可从Polymer Scource,Inc.of Dorval,Canada购得。
捕获试剂用作分析物/探针复合物的固定结合位点。具体地说,分析物,例如抗体、抗原等,一般具有两个结合位点。在到达检测区31之后,这些结合位点之一被缀合探针的特异性结合部分所占据。然而,分析物的游离结合位点能够结合到固定捕获试剂上。在结合到固定捕获试剂上之后,复合探针形成新的三元夹心复合物。
检测区31通常可具有任何数目的不同检测区,以便使用者能够更好地确定测试样品内特定分析物的浓度。每个区域可含有相同的捕获试剂,或者可含有用于捕获多种分析物的不同捕获试剂。例如,检测区31可包括两个或更多个不同的检测区(例如线、点等)。检测区可以线的形式位于基本上垂直于通过测定装置20的测试样品流的方向上。同样,在一些实施方案中,检测区可以线的形式位于基本上平行于通过测定装置20的测试样品流的方向上。
虽然检测区31可指示出分析物的存在,但是仅利用检测区31经常难以确定测试样品内分析物的相对浓度。于是,测定装置20还可包括校正区32。在该实施方案中,校正区32形成在多孔膜23上,并位于检测区31的下游。校正区32配有捕获试剂,该试剂能够结合穿过膜23的长度的任何剩余的未捕获探针。校正区32中所采用的捕获试剂可与检测区31中所用的捕获试剂相同或不同。而且,与检测区31类似,校正区32还可在任何方向上提供任何数目的不同校正区,以便使用者能够更好地确定测试样品内特定分析物的浓度。每个区域可含有相同的捕获试剂,或者可含有用于捕获不同探针的不同捕获试剂。
校正区可以用不同量的捕获试剂预先装载到多孔膜23上,以便在探针迁移后由每个校正区产生不同的信号强度。通过采用不同尺寸的校正区和/或通过改变每个校正区内的捕获试剂的浓度或体积,能够改变每个校正区内结合物的总量。如果需要的话,将过量的探针用于测定装置20,以便每个校正区达到其完全预定的信号强度电位。也就是说,沉积在校正区上的探针的量是预定的,因为校正区上采用的捕获试剂的量设定在预定的已知水平上。
总之,可按照本发明构建各种流通测定装置。关于这一点,现在更详细地描述本发明的多个不同的实施方案。然而,应该理解,下述实施方案仅仅是示范性的,本发明还包括其它实施方案。例如,参照图3-4,这些图表示出一个特定实施方案,其中探针41用于检测,探针43用于校正。在该实施方案中,检测探针41和校正探针43加入到缀合垫22上,并且在以与测试样品相通的方式放置时,由此能够流过装置20(如方向箭头L所指示的)。检测探针41与分析物A的特异性结合部分90缀合,因此,在探针41与分析物A接触之后就结合到其上,从而形成分析物/探针复合物49。
如图3所示,探针/分析物复合物49、任何游离的分析物A以及校正探针43从缀合垫22通过多孔膜23,直到到达层析区35为止,在层析区上有多个微孔颗粒50。较大的复合物49和校正探针43容易流过颗粒50之间的空间52,而较小的未复合的分析物A以较慢的速率流到颗粒50的微孔内。分析物/探针复合物49然后流过装置20,直到其到达检测区31为止,在检测区31,它们结合到捕获试剂91(例如抗体)上,形成夹心复合物53。而且,校正探针43流到校正区32并与捕获试剂(未示出)例如聚电解质结合。其后,如图4所示,未复合的分析物A穿过层析区35,到达检测区31。然而,由于复合物49已经结合到捕获试剂上,因此分析物A穿过检测区31和校正区32,直到其到达芯吸垫28为止。这样,在检测区31,能够由检测探针41的信号强度确定分析物的量。如果需要的话,此信号强度可以用校正区32中的校正探针43的信号强度来校正。信号强度可目视测定或借助于设备例如荧光读数器来测定。
虽然上面已经描述了装置结构的多个不同的实施方案,但是应该理解,本发明的装置一般可具有任何所需的结构,并且不必含有上述所有部件。各种其它装置结构和/或测定形式,例如在 Lambotte等人的U.S.5,395,754; Jou等人的U.S.5,670,381;和 Malick等人的U.S.6,194,220中有所描述,这些文献在此作为参考全部并入本文。
本发明人已经发现,层析区在测定装置的多孔膜上的存在,能够以简单、有效和相对廉价的方式有效减小“钩效应”。尤其是,多个微孔颗粒位于层析区上,使得较大尺寸的分析物/探针复合物在任何未复合的分析物之前到达检测区。据此,未复合的分析物不与复合物竞争检测区上有用的结合位点。由于抑制了未复合的分析物占据检测区的大多数结合位点,因此可限制“假阴性”的发生,甚至在较高的分析物浓度时。
虽然已经就本发明的具体实施方案详细描述了本发明,但是本领域的技术人员应该理解,在领会上述内容之后,容易构思这些实施方案的替换形式、变型和等同物。因此,本发明的范围应该由所附的权利要求书及其等同物来确定。

Claims (33)

1、一种用于检测测试样品中分析物的存在或数量的流通测定装置,所述流通测定装置包括多孔膜,所述多孔膜与能够产生检测信号的缀合检测探针相通,所述多孔膜限定出:
层析区,在所述层析区内固定有多个微孔颗粒;以及
位于所述层析区下游的检测区,其中捕获试剂固定在所述检测区内,所述捕获试剂被构造成结合到所述缀合检测探针上,其中在所述检测区内,所述缀合检测探针能够产生检测信号,由所述检测信号来确定测试样品内分析物的量。
2、如权利要求1所述的流通测定装置,其中所述微孔颗粒在相互之间限定出多个空间,所述空间的平均尺寸大于所述颗粒的微孔的平均尺寸。
3、如权利要求1所述的流通测定装置,其中所述微孔的平均尺寸比所述空间的平均尺寸至少小约100%。
4、如权利要求1所述的流通测定装置,其中所述微孔的平均尺寸比所述空间的平均尺寸至少小约150%。
5、如权利要求1所述的流通测定装置,其中所述微孔的平均尺寸比所述空间的平均尺寸至少小约250%。
6、如权利要求1所述的流通测定装置,其中所述微孔的平均尺寸小于约100纳米。
7、如权利要求1所述的流通测定装置,其中所述微孔的平均尺寸为约10-约60纳米。
8、如权利要求1所述的流通测定装置,其中所述微孔颗粒选自聚苯乙烯、聚丙烯酰胺、聚丙烯腈、硅珠、以及这些物质的组合。
9、如权利要求1所述的流通测定装置,其中所述微孔颗粒的表面对于分析物是化学惰性的。
10、如权利要求1所述的流通测定装置,其中所述缀合检测探针包括选自以下的物质:发色团、催化剂、荧光化合物、化学发光化合物、磷光化合物、放射性化合物、直接目视标记物、脂质体、以及这些物质的组合。
11、如权利要求1所述的流通测定装置,其中所述多孔膜还包括能够产生校正信号的校正区,其中由所述校正信号校正的所述检测信号来确定测试样品内分析物的量。
12、如权利要求11所述的流通测定装置,其中所述多孔膜与校正探针相通,所述校正探针在存在于所述校正区内时产生所述校正信号。
13、如权利要求1所述的流通测定装置,其中所述装置是夹心型测定装置。
14、一种用于检测测试样品中分析物的存在或数量的流通夹心测定装置,所述测定装置包括多孔膜,所述多孔膜与能够产生检测信号的缀合检测探针相通,所述缀合检测探针被构造成在与测试样品中的分析物接触时能够与其结合,从而形成分析物/探针复合物和未复合的分析物,所述多孔膜限定出:
层析区,在所述层析区内固定有多个微孔颗粒,所述微孔颗粒被构造成使所述未复合的分析物以比所述分析物/探针复合物慢的速率流过所述层析区;以及
位于所述层析区下游的检测区,其中捕获试剂固定在所述检测区内,所述捕获试剂被构造成结合到所述分析物/探针复合物上,从而在所述检测区内,所述复合物产生检测信号,其中由所述检测信号来确定测试样品内分析物的量。
15、如权利要求14所述的流通夹心测定装置,其中所述微孔颗粒在相互之间限定出多个空间,所述空间的平均尺寸大于所述颗粒的微孔的平均尺寸。
16、如权利要求14所述的流通夹心测定装置,其中所述微孔的平均尺寸比所述空间的平均尺寸至少小约100%。
17、如权利要求14所述的流通夹心测定装置,其中所述微孔的平均尺寸比所述空间的平均尺寸至少小约150%。
18、如权利要求14所述的流通夹心测定装置,其中所述微孔的平均尺寸比所述空间的平均尺寸至少小约250%。
19、如权利要求14所述的流通夹心测定装置,其中所述微孔颗粒选自聚苯乙烯、聚丙烯酰胺、聚丙烯腈、硅珠、以及这些物质的组合。
20、如权利要求14所述的流通夹心测定装置,其中所述微孔颗粒的表面对于分析物是化学惰性的。
21、如权利要求14所述的流通夹心测定装置,其中所述多孔膜还包括能够产生校正信号的校正区,其中由所述校正信号校正的所述检测信号来确定测试样品内分析物的量。
22、如权利要求21所述的流通夹心测定装置,其中所述多孔膜与校正探针相通,所述校正探针在存在于所述校正区内时产生所述校正信号。
23、一种用于检测测试样品中分析物的存在或数量的方法,所述方法包括:
i)提供一种流通测定装置,所述装置包括多孔膜,所述多孔膜与能够产生检测信号的缀合检测探针相通,所述多孔膜限定出层析区和位于所述层析区下游的检测区,在所述层析区内固定有多个微孔颗粒,其中捕获试剂固定在所述检测区内;
ii)使含有分析物的测试样品与所述缀合检测探针接触,从而形成分析物/探针复合物和未复合的分析物;以及
iii)使所述分析物/探针复合物和所述未复合的分析物到达所述层析区,然后到达检测区,其中所述分析物/探针复合物在所述未复合的分析物之前到达所述检测区。
24、如权利要求23所述的方法,其中所述微孔颗粒在相互之间限定出多个空间,所述空间的平均尺寸大于所述颗粒的微孔的平均尺寸。
25、如权利要求23所述的方法,其中所述微孔的平均尺寸比所述空间的平均尺寸至少小约100%。
26、如权利要求23所述的方法,其中所述微孔的平均尺寸比所述空间的平均尺寸至少小约150%。
27、如权利要求23所述的方法,其中所述微孔的平均尺寸比所述空间的平均尺寸至少小约100%。
28、如权利要求23所述的方法,其中所述微孔颗粒选自聚苯乙烯、聚丙烯酰胺、聚丙烯腈、硅珠、以及这些物质的组合。
29、如权利要求23所述的方法,其中所述微孔颗粒的表面对于分析物是化学惰性的。
30、如权利要求23所述的方法,其中还包括测定所述检测区内产生的检测信号的强度。
31、如权利要求23所述的方法,其中所述多孔膜还包括能够产生校正信号的校正区,其中由所述校正信号校正的所述检测信号来确定测试样品内分析物的量。
32、如权利要求31所述的方法,其中所述多孔膜与校正探针相通,所述校正探针在存在于所述校正区内时产生所述校正信号。
33、如权利要求32所述的方法,其中还包括通过针对多个预定的分析物浓度绘制由校正信号的强度校正的检测信号的强度来产生校正曲线。
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106153924A (zh) * 2015-03-23 2016-11-23 中国科学院宁波材料技术与工程研究所 试剂盒、检测系统,其制备方法及应用
CN112534039A (zh) * 2018-08-06 2021-03-19 贝克顿·迪金森公司 带有分离膜的侧向流动免疫测定设备

Families Citing this family (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7285424B2 (en) 2002-08-27 2007-10-23 Kimberly-Clark Worldwide, Inc. Membrane-based assay devices
US7247500B2 (en) 2002-12-19 2007-07-24 Kimberly-Clark Worldwide, Inc. Reduction of the hook effect in membrane-based assay devices
US7906276B2 (en) 2004-06-30 2011-03-15 Kimberly-Clark Worldwide, Inc. Enzymatic detection techniques
US7521226B2 (en) 2004-06-30 2009-04-21 Kimberly-Clark Worldwide, Inc. One-step enzymatic and amine detection technique
US7094528B2 (en) 2004-06-30 2006-08-22 Kimberly-Clark Worldwide, Inc. Magnetic enzyme detection techniques
US20060019406A1 (en) * 2004-07-23 2006-01-26 Ning Wei Lateral flow device for the detection of large pathogens
US7829347B2 (en) 2005-08-31 2010-11-09 Kimberly-Clark Worldwide, Inc. Diagnostic test kits with improved detection accuracy
US7504235B2 (en) 2005-08-31 2009-03-17 Kimberly-Clark Worldwide, Inc. Enzyme detection technique
US8758989B2 (en) * 2006-04-06 2014-06-24 Kimberly-Clark Worldwide, Inc. Enzymatic detection techniques
US8012761B2 (en) * 2006-12-14 2011-09-06 Kimberly-Clark Worldwide, Inc. Detection of formaldehyde in urine samples
US7897360B2 (en) 2006-12-15 2011-03-01 Kimberly-Clark Worldwide, Inc. Enzyme detection techniques
US7935538B2 (en) * 2006-12-15 2011-05-03 Kimberly-Clark Worldwide, Inc. Indicator immobilization on assay devices
US7846383B2 (en) * 2006-12-15 2010-12-07 Kimberly-Clark Worldwide, Inc. Lateral flow assay device and absorbent article containing same
EP2140265B1 (en) * 2007-03-22 2012-10-31 Scandinavian Micro Biodevices A/S A flow through system, flow through device and a method of performing a test
US8796184B2 (en) 2008-03-28 2014-08-05 Sentilus, Inc. Detection assay devices and methods of making and using the same
DE102009010563A1 (de) 2009-02-16 2010-08-26 Matthias W. Engel Vorrichtung zum Nachweis von Analyten in Körperflüssigkeiten
US20100290948A1 (en) * 2009-05-15 2010-11-18 Xuedong Song Absorbent articles capable of indicating the presence of urinary tract infections
US8956859B1 (en) 2010-08-13 2015-02-17 Aviex Technologies Llc Compositions and methods for determining successful immunization by one or more vaccines
US8486717B2 (en) 2011-01-18 2013-07-16 Symbolics, Llc Lateral flow assays using two dimensional features
US9874556B2 (en) 2012-07-18 2018-01-23 Symbolics, Llc Lateral flow assays using two dimensional features
US20140072959A1 (en) 2012-09-12 2014-03-13 Force Diagnostics, Inc. Rapid tests for insurance underwriting
CN105102980B (zh) 2013-02-26 2017-11-03 阿斯图特医药公司 具有试条保持件的横向流动测定法
CN108051590B (zh) 2013-09-13 2020-12-11 Symbolics有限责任公司 运用二维试验和对照信号读出模式的侧向层析检测
JP2018513983A (ja) 2015-04-06 2018-05-31 ブルーダイアグノスティックス・インコーポレイテッドBludiagnostics, Inc. 唾液試料中の分析物を検出するための試験装置および使用方法
US20210278403A1 (en) 2016-08-23 2021-09-09 Qoolabs, Inc. Lateral flow assay for assessing recombinant protein expression or reporter gene expression

Family Cites Families (342)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US164659A (en) 1875-06-22 Improvement in processes of preparing pickles
US1366241A (en) 1919-10-03 1921-01-18 Frederick W Burch Ratchet mechanism for camp-beds
US3772076A (en) 1970-01-26 1973-11-13 Hercules Inc Reaction products of epihalohydrin and polymers of diallylamine and their use in paper
US3700623A (en) 1970-04-22 1972-10-24 Hercules Inc Reaction products of epihalohydrin and polymers of diallylamine and their use in paper
CS179075B1 (en) 1974-11-26 1977-10-31 Stoy Vladimir Mode of manufacture of spherical particles from polymer
SE388694B (sv) 1975-01-27 1976-10-11 Kabi Ab Sett att pavisa ett antigen exv i prov av kroppvetskor, med utnyttjande av till porost berarmaterial bundna eller adsorberande antikroppar
USRE30267E (en) 1975-06-20 1980-05-06 Eastman Kodak Company Multilayer analytical element
US4094647A (en) 1976-07-02 1978-06-13 Thyroid Diagnostics, Inc. Test device
US4210723A (en) 1976-07-23 1980-07-01 The Dow Chemical Company Method of coupling a protein to an epoxylated latex
US4115535A (en) 1977-06-22 1978-09-19 General Electric Company Diagnostic method employing a mixture of normally separable protein-coated particles
US4275149A (en) 1978-11-24 1981-06-23 Syva Company Macromolecular environment control in specific receptor assays
US4374925A (en) 1978-11-24 1983-02-22 Syva Company Macromolecular environment control in specific receptor assays
US4235601A (en) 1979-01-12 1980-11-25 Thyroid Diagnostics, Inc. Test device and method for its use
US4361537A (en) 1979-01-12 1982-11-30 Thyroid Diagnostics, Inc. Test device and method for its use
US4441373A (en) 1979-02-21 1984-04-10 American Hospital Supply Corporation Collection tube for drawing samples of biological fluids
US4312228A (en) 1979-07-30 1982-01-26 Henry Wohltjen Methods of detection with surface acoustic wave and apparati therefor
US4849338A (en) 1982-07-16 1989-07-18 Syntex (U.S.A.) Inc. Simultaneous calibration heterogeneous immunoassay
US5156953A (en) 1979-12-26 1992-10-20 Syntex (U.S.A.) Inc. Simultaneous calibration heterogeneous immunoassay
US5432057A (en) 1979-12-26 1995-07-11 Syva Company Simultaneous calibration heterogeneous immunoassay
US4540659A (en) 1981-04-17 1985-09-10 Syva Company Simultaneous calibration heterogeneous immunoassay
US4533629A (en) 1981-04-17 1985-08-06 Syva Company Simultaneous calibration heterogeneous immunoassay
US4843000A (en) 1979-12-26 1989-06-27 Syntex (U.S.A.) Inc. Simultaneous calibration heterogeneous immunoassay
US4299916A (en) 1979-12-26 1981-11-10 Syva Company Preferential signal production on a surface in immunoassays
FR2478086A1 (fr) 1980-02-14 1981-09-18 Ciba Geigy Ag Procede pour la preparation de composes du triarylmethane
US4427836A (en) 1980-06-12 1984-01-24 Rohm And Haas Company Sequential heteropolymer dispersion and a particulate material obtainable therefrom, useful in coating compositions as a thickening and/or opacifying agent
US4366241A (en) 1980-08-07 1982-12-28 Syva Company Concentrating zone method in heterogeneous immunoassays
US4385126A (en) 1980-11-19 1983-05-24 International Diagnostic Technology, Inc. Double tagged immunoassay
US4426451A (en) 1981-01-28 1984-01-17 Eastman Kodak Company Multi-zoned reaction vessel having pressure-actuatable control means between zones
US4442204A (en) 1981-04-10 1984-04-10 Miles Laboratories, Inc. Homogeneous specific binding assay device and preformed complex method
US4444592A (en) 1981-06-02 1984-04-24 The Sherwin-Williams Company Pigment compositions and processes therefor
US4363874A (en) 1981-08-07 1982-12-14 Miles Laboratories, Inc. Multilayer analytical element having an impermeable radiation nondiffusing reflecting layer
EP0073593A1 (en) * 1981-09-01 1983-03-09 E.I. Du Pont De Nemours And Company Size-exclusion heterogeneous immunoassay
US4480042A (en) 1981-10-28 1984-10-30 E. I. Du Pont De Nemours And Company Covalently bonded high refractive index particle reagents and their use in light scattering immunoassays
US4477635A (en) 1982-01-04 1984-10-16 Minnesota Mining And Manufacturing Company Polymeric triarylmethane dyes
US4435504A (en) 1982-07-15 1984-03-06 Syva Company Immunochromatographic assay with support having bound "MIP" and second enzyme
US4534356A (en) 1982-07-30 1985-08-13 Diamond Shamrock Chemicals Company Solid state transcutaneous blood gas sensors
US4632559A (en) 1982-11-29 1986-12-30 Miles Laboratories, Inc. Optical readhead
US4537861A (en) 1983-02-03 1985-08-27 Elings Virgil B Apparatus and method for homogeneous immunoassay
GB8314523D0 (en) 1983-05-25 1983-06-29 Lowe C R Diagnostic device
DE3464252D1 (en) 1983-06-03 1987-07-23 Hoffmann La Roche Labelled molecules for fluorescence immunoassays and processes and intermediates for their preparation
CH662421A5 (de) 1983-07-13 1987-09-30 Suisse Horlogerie Rech Lab Piezoelektrischer kontaminationsdetektor.
US4537657A (en) 1983-08-26 1985-08-27 Hercules Incorporated Wet strength resins
US4552458A (en) 1983-10-11 1985-11-12 Eastman Kodak Company Compact reflectometer
EP0205698B1 (en) 1985-06-28 1990-01-03 EASTMAN KODAK COMPANY (a New Jersey corporation) Compact reflectometer
US4595661A (en) 1983-11-18 1986-06-17 Beckman Instruments, Inc. Immunoassays and kits for use therein which include low affinity antibodies for reducing the hook effect
US4703017C1 (en) 1984-02-14 2001-12-04 Becton Dickinson Co Solid phase assay with visual readout
US4698262A (en) 1984-04-27 1987-10-06 Becton, Dickinson And Company Fluorescently labeled microbeads
US4632901A (en) 1984-05-11 1986-12-30 Hybritech Incorporated Method and apparatus for immunoassays
US4586695A (en) 1984-06-22 1986-05-06 Miller Charlie D Continuous tube extractor
FI842992A0 (fi) 1984-07-26 1984-07-26 Labsystems Oy Immunologiskt definitionsfoerfarande.
US4661235A (en) 1984-08-03 1987-04-28 Krull Ulrich J Chemo-receptive lipid based membrane transducers
US4596697A (en) 1984-09-04 1986-06-24 The United States Of America As Represented By The Secretary Of The Army Chemical sensor matrix
US5310687A (en) * 1984-10-31 1994-05-10 Igen, Inc. Luminescent metal chelate labels and means for detection
US5026653A (en) 1985-04-02 1991-06-25 Leeco Diagnostic, Inc. Scavenger antibody mixture and its use for immunometric assay
US4722889A (en) 1985-04-02 1988-02-02 Leeco Diagnostics, Inc. Immunoassays using multiple monoclonal antibodies and scavenger antibodies
CA1272127A (en) 1985-04-04 1990-07-31 Hybritech Incorporated Solid phase system for use in ligand-receptor assays
US4743542A (en) 1985-04-11 1988-05-10 Ortho Diagnostic Method for forestalling the hook effect in a multi-ligand immunoassay system
GB8509492D0 (en) 1985-04-12 1985-05-15 Plessey Co Plc Optical assay
US4963498A (en) 1985-08-05 1990-10-16 Biotrack Capillary flow device
US5238815A (en) 1985-08-30 1993-08-24 Toyo Soda Manufacturing Co., Ltd. Enzymatic immunoassay involving detecting fluorescence while oscillating magnetic beads
US5500350A (en) * 1985-10-30 1996-03-19 Celltech Limited Binding assay device
US4917503A (en) 1985-12-02 1990-04-17 Lifelines Technology, Inc. Photoactivatable leuco base time-temperature indicator
US4714682A (en) 1985-12-11 1987-12-22 Flow Cytometry Standards Corporation Fluorescent calibration microbeads simulating stained cells
US4868126A (en) 1985-12-11 1989-09-19 Flow Cytometry Standards Corporation Method of calibrating a fluorescent microscope using fluorescent calibration microbeads simulating stained cells
CA1291031C (en) 1985-12-23 1991-10-22 Nikolaas C.J. De Jaeger Method for the detection of specific binding agents and their correspondingbindable substances
US5585279A (en) 1986-01-23 1996-12-17 Davidson; Robert S. Time-resolved luminescence binding assays using a fluorescent transition metal label other than ruthenium
US4916056A (en) 1986-02-18 1990-04-10 Abbott Laboratories Solid-phase analytical device and method for using same
US5482830A (en) 1986-02-25 1996-01-09 Biostar, Inc. Devices and methods for detection of an analyte based upon light interference
US5468606A (en) 1989-09-18 1995-11-21 Biostar, Inc. Devices for detection of an analyte based upon light interference
US4776944A (en) 1986-03-20 1988-10-11 Jiri Janata Chemical selective sensors utilizing admittance modulated membranes
US5591581A (en) * 1986-04-30 1997-01-07 Igen, Inc. Electrochemiluminescent rhenium moieties and methods for their use
JP2802921B2 (ja) * 1986-06-17 1998-09-24 マイクロスキャン、インコーポレイテッド 蛍光バックグラウンド消去および水溶性希土類金属キレートフルオロフォルを使用する均質蛍光アッセイ
GB8618133D0 (en) 1986-07-24 1986-09-03 Pa Consulting Services Biosensors
JPH0692969B2 (ja) 1986-07-30 1994-11-16 株式会社シノテスト 免疫的測定方法
US5182135A (en) 1986-08-12 1993-01-26 Bayer Aktiengesellschaft Process for improving the adherency of metallic coatings deposited without current on plastic surfaces
US4935346A (en) 1986-08-13 1990-06-19 Lifescan, Inc. Minimum procedure system for the determination of analytes
US4867908A (en) 1986-08-29 1989-09-19 Becton, Dickinson And Company Method and materials for calibrating flow cytometers and other analysis instruments
GB2197065A (en) 1986-11-03 1988-05-11 Stc Plc Optical sensor device
EP0335902B1 (en) 1986-12-15 1993-12-01 British Technology Group Usa Inc. Monomeric phthalocyanine reagents
US4857453A (en) 1987-04-07 1989-08-15 Syntex (U.S.A.) Inc. Immunoassay device
US4855240A (en) 1987-05-13 1989-08-08 Becton Dickinson And Company Solid phase assay employing capillary flow
GB8713649D0 (en) 1987-06-11 1987-07-15 Pa Consulting Services Biological assay
US4842783A (en) 1987-09-03 1989-06-27 Cordis Corporation Method of producing fiber optic chemical sensors incorporating photocrosslinked polymer gels
SE8703682L (sv) * 1987-09-24 1989-03-25 Wallac Oy Homogen bestaemningsmetod som utnyttjar affinitetsreaktioner
US5670381A (en) 1988-01-29 1997-09-23 Abbott Laboratories Devices for performing ion-capture binding assays
EP0400086B1 (en) 1988-02-08 1993-01-27 University College Cardiff Consultants Ltd. Detection of diamines in biological fluids
US5268306A (en) 1988-02-29 1993-12-07 Boehringer Mannheim Gmbh Preparation of a solid phase matrix containing a bound specific binding pair
US5145784A (en) 1988-05-04 1992-09-08 Cambridge Biotech Corporation Double capture assay method employing a capillary flow device
EP0341928A1 (en) 1988-05-10 1989-11-15 AMERSHAM INTERNATIONAL plc Improvements relating to surface plasmon resonance sensors
EP0341927B1 (en) 1988-05-10 1993-07-14 AMERSHAM INTERNATIONAL plc Biological sensors
GB8811919D0 (en) 1988-05-20 1988-06-22 Amersham Int Plc Biological sensors
GB8813307D0 (en) 1988-06-06 1988-07-13 Amersham Int Plc Biological sensors
US4877586A (en) 1988-07-27 1989-10-31 Eastman Kodak Company Sliding test device for assays
US5075077A (en) 1988-08-02 1991-12-24 Abbott Laboratories Test card for performing assays
AT390517B (de) 1988-08-04 1990-05-25 Avl Verbrennungskraft Messtech Optischer sensor und verfahren zu dessen herstellung
US4973670A (en) 1988-08-12 1990-11-27 The Dow Chemical Company Method for preparing hollow latexes
US5252459A (en) 1988-09-23 1993-10-12 Abbott Laboratories Indicator reagents, diagnostic assays and test kits employing organic polymer latex particles
EP0363504A1 (en) 1988-10-10 1990-04-18 Dräger Nederland B.V. Method of providing a substrate with a layer comprising a polyvinylbased hydrogel and a biochemically active material
US6448091B1 (en) 1988-11-03 2002-09-10 Igen International, Inc. Method and apparatus for improved luminescence assays using particle concentration chemiluminescence detection
SE462454B (sv) 1988-11-10 1990-06-25 Pharmacia Ab Maetyta foer anvaendning i biosensorer
SE8804074D0 (sv) 1988-11-10 1988-11-10 Pharmacia Ab Sensorenhet och dess anvaendning i biosensorsystem
SE8902043L (sv) 1988-11-10 1990-05-11 Pharmacia Ab Foerfarande foer karakterisering av makromolekyler
US5003178A (en) 1988-11-14 1991-03-26 Electron Vision Corporation Large-area uniform electron source
US5063081A (en) 1988-11-14 1991-11-05 I-Stat Corporation Method of manufacturing a plurality of uniform microfabricated sensing devices having an immobilized ligand receptor
US4940734A (en) 1988-11-23 1990-07-10 American Cyanamid Process for the preparation of porous polymer beads
DE68920126T2 (de) * 1988-11-23 1995-05-11 Cytec Tech Corp Poröse Polymerperlen und Verfahren.
US4895017A (en) 1989-01-23 1990-01-23 The Boeing Company Apparatus and method for early detection and identification of dilute chemical vapors
US5096671A (en) 1989-03-15 1992-03-17 Cordis Corporation Fiber optic chemical sensors incorporating electrostatic coupling
US5120662A (en) 1989-05-09 1992-06-09 Abbott Laboratories Multilayer solid phase immunoassay support and method of use
US5234813A (en) 1989-05-17 1993-08-10 Actimed Laboratories, Inc. Method and device for metering of fluid samples and detection of analytes therein
US5770416A (en) * 1989-05-26 1998-06-23 Upfront Chromatography A/S Permeable hollow particles having an outer shell of mechanically rigid porous material
US5143854A (en) 1989-06-07 1992-09-01 Affymax Technologies N.V. Large scale photolithographic solid phase synthesis of polypeptides and receptor binding screening thereof
US5744101A (en) 1989-06-07 1998-04-28 Affymax Technologies N.V. Photolabile nucleoside protecting groups
GB9008261D0 (en) 1990-04-11 1990-06-13 Ares Serono Res & Dev Ltd Method of improving assay sensitivity
JPH0366384A (ja) 1989-08-04 1991-03-22 Senjiyu Seiyaku Kk 生理活性物質放出制御システム
US5235238A (en) 1989-08-10 1993-08-10 Dainabot Company, Limited Electrode-separated piezoelectric crystal oscillator and method for measurement using the electrode-separated piezoelectric crystal oscillator
AU635314B2 (en) 1989-09-08 1993-03-18 Terumo Kabushiki Kaisha Measuring apparatus
CA2003942A1 (en) 1989-09-26 1991-03-26 Julie Lia Rudolph Solid assay support systems
JP2979414B2 (ja) * 1989-09-29 1999-11-15 富士レビオ株式会社 磁性粒子およびそれを用いた免疫測定法
GB8923699D0 (en) 1989-10-20 1989-12-06 Univ Strathclyde Apparatus for assessing a particular property in a medium
US5225935A (en) 1989-10-30 1993-07-06 Sharp Kabushiki Kaisha Optical device having a microlens and a process for making microlenses
US5252743A (en) 1989-11-13 1993-10-12 Affymax Technologies N.V. Spatially-addressable immobilization of anti-ligands on surfaces
GB8927503D0 (en) 1989-12-04 1990-02-07 Kronem Systems Inc Enzyme-amplified lanthanide chelate luminescence
US5508171A (en) 1989-12-15 1996-04-16 Boehringer Mannheim Corporation Assay method with enzyme electrode system
US5252496A (en) * 1989-12-18 1993-10-12 Princeton Biomeditech Corporation Carbon black immunochemical label
US5326692B1 (en) 1992-05-13 1996-04-30 Molecular Probes Inc Fluorescent microparticles with controllable enhanced stokes shift
EP0462376B1 (en) 1990-05-09 1996-07-24 Abbott Laboratories Conjugate recovery binding assays
DE69032425T2 (de) * 1990-05-11 1998-11-26 Microprobe Corp., Bothell, Wash. Teststreifen zum Eintauchen für Nukleinsäure-Hybridisierungsassays und Verfahren zur kovalenten Immobilisierung von Oligonucleotiden
DK138090D0 (da) 1990-06-06 1990-06-06 Novo Nordisk As Diagnostisk analysemetode
DE4024476C1 (zh) 1990-08-02 1992-02-27 Boehringer Mannheim Gmbh, 6800 Mannheim, De
GB9019123D0 (en) 1990-09-01 1990-10-17 Fisons Plc Analytical device
US5200084A (en) 1990-09-26 1993-04-06 Immunicon Corporation Apparatus and methods for magnetic separation
US5076094A (en) 1990-10-03 1991-12-31 The United States Of America As Represented By The United States Department Of Energy Dual output acoustic wave sensor for molecular identification
US5700636A (en) 1990-10-19 1997-12-23 Becton Dickinson And Company Methods for selectively detecting microorganisms associated with vaginal infections in complex biological samples
US5726064A (en) 1990-11-22 1998-03-10 Applied Research Systems Ars Holding Nv Method of assay having calibration within the assay
US6027944A (en) 1990-11-22 2000-02-22 Applied Research Systems Ars Holding Nv Capillary-fill biosensor device comprising a calibration zone
US5510481A (en) 1990-11-26 1996-04-23 The Regents, University Of California Self-assembled molecular films incorporating a ligand
US5208535A (en) 1990-12-28 1993-05-04 Research Development Corporation Of Japan Mr position detecting device
US5834226A (en) 1991-01-31 1998-11-10 Xytronyx, Inc. One-step test for aspartate aminotransferase
GB9102646D0 (en) 1991-02-07 1991-03-27 Fisons Plc Analytical device
IL97318A0 (en) * 1991-02-20 1992-05-25 Diagnostic Markers Inc Method for the very rapid detection of polyamines
US5466574A (en) 1991-03-25 1995-11-14 Immunivest Corporation Apparatus and methods for magnetic separation featuring external magnetic means
US5795470A (en) * 1991-03-25 1998-08-18 Immunivest Corporation Magnetic separation apparatus
US5196350A (en) 1991-05-29 1993-03-23 Omnigene, Inc. Ligand assay using interference modulation
ES2121016T3 (es) 1991-05-30 1998-11-16 Abbott Lab Reactivos y procedimientos que permiten realizar analisis de fijacion con captura de iones en dos etapas.
CA2110296A1 (en) 1991-05-30 1992-12-10 Steven Kline Methods and reagents for performing ion-capture digoxin assays
ES2136090T3 (es) 1991-05-30 1999-11-16 Abbott Lab Reactivos que contienen un inhibidor de fijacion no especifico para analisis de fijacion con captura de iones.
KR100212178B1 (ko) 1991-07-10 1999-08-02 리차드 제이 마세이 입자농도 및 화학발광 검출을 이용한 개선된 발광 검정 장치 및 방법
US5179288A (en) 1991-09-30 1993-01-12 Ortho Pharmaceutical Corporation Apparatus and method for measuring a bodily constituent
US5418136A (en) 1991-10-01 1995-05-23 Biostar, Inc. Devices for detection of an analyte based upon light interference
DK0608370T3 (da) 1991-10-15 1998-09-07 Multilyte Ltd Bindingsassay med anvendelse af mærket reagens
US5424219A (en) * 1991-10-25 1995-06-13 Cytech Biomedical, Inc. Method of performing assays for biomolecules and solid supports for use in such methods
EP0643777A4 (en) 1992-01-22 1995-06-07 Abbott Lab CALIBRATION REAGENTS FOR SEMI-QUANTITATIVE BINDING ASSAYS AND DEVICES.
US5221454A (en) 1992-01-31 1993-06-22 Biometric Imaging Inc. Differential separation assay
US5137609A (en) 1992-01-31 1992-08-11 Biometric Imaging Inc. Differential separation assay
US5445971A (en) * 1992-03-20 1995-08-29 Abbott Laboratories Magnetically assisted binding assays using magnetically labeled binding members
EP0631669B1 (en) 1992-03-20 2004-07-14 Abbott Laboratories Magnetically assisted binding assays using magnetically-labeled binding members
US6156270A (en) * 1992-05-21 2000-12-05 Biosite Diagnostics, Inc. Diagnostic devices and apparatus for the controlled movement of reagents without membranes
US5885527A (en) * 1992-05-21 1999-03-23 Biosite Diagnostics, Inc. Diagnostic devices and apparatus for the controlled movement of reagents without membrances
JP3311752B2 (ja) * 1992-07-02 2002-08-05 ソイニ,エルッキ 生体特異的多変数検定法
US5395754A (en) * 1992-07-31 1995-03-07 Hybritech Incorporated Membrane-based immunoassay method
US5321492A (en) 1992-08-07 1994-06-14 Miles Inc. Dual function readhead for a reflectance instrument
GB9217864D0 (en) 1992-08-21 1992-10-07 Unilever Plc Monitoring method
US5356782A (en) 1992-09-03 1994-10-18 Boehringer Mannheim Corporation Analytical test apparatus with on board negative and positive control
US6399397B1 (en) * 1992-09-14 2002-06-04 Sri International Up-converting reporters for biological and other assays using laser excitation techniques
EP0588153B1 (de) 1992-09-14 1996-12-27 Siemens Aktiengesellschaft Gassensor
GB9221329D0 (en) 1992-10-10 1992-11-25 Delta Biotechnology Ltd Preparation of further diagnostic agents
GB2273772A (en) 1992-12-16 1994-06-29 Granta Lab Ltd Detection of macromolecules utilising light diffraction
US5358852A (en) 1992-12-21 1994-10-25 Eastman Kodak Company Use of calcium in immunoassay for measurement of C-reactive protein
TW239881B (zh) 1992-12-22 1995-02-01 Sienna Biotech Inc
US6200820B1 (en) 1992-12-22 2001-03-13 Sienna Biotech, Inc. Light scatter-based immunoassay
US5327225A (en) 1993-01-28 1994-07-05 The Center For Innovative Technology Surface plasmon resonance sensor
FI932866A0 (fi) * 1993-06-21 1993-06-21 Labsystems Oy Separeringsfoerfarande
US5422726A (en) * 1993-02-16 1995-06-06 Tyler; Jonathan M. Solid state spectrofluorimeter and method of using the same
US5374531A (en) 1993-03-22 1994-12-20 Zynaxis, Inc. Immunoassay for determination of cells
DE4309393A1 (de) * 1993-03-23 1994-09-29 Boehringer Mannheim Gmbh Verringerung des Hook-Effekts in Immuntests mit teilchenförmigem Trägermaterial
DE4310142A1 (de) 1993-03-29 1994-10-06 Boehringer Mannheim Gmbh Immunologisch aktive Konjugate und ein Verfahren zu ihrer Herstellung
JP3479100B2 (ja) 1993-06-02 2003-12-15 帝国臓器製薬株式会社 免疫化学的簡易半定量方法および装置
JPH0710640A (ja) * 1993-06-25 1995-01-13 Teruo Higa 機能性セラミックスの製造法
US5658443A (en) 1993-07-23 1997-08-19 Matsushita Electric Industrial Co., Ltd. Biosensor and method for producing the same
FR2708348B1 (fr) 1993-07-28 1995-10-06 Stago Diagnostica Procédé de dosage d'une substance immunologique au moyen de particules de latex magnétiques et de particules non-magnétiques.
US5484867A (en) 1993-08-12 1996-01-16 The University Of Dayton Process for preparation of polyhedral oligomeric silsesquioxanes and systhesis of polymers containing polyhedral oligomeric silsesqioxane group segments
US5837546A (en) 1993-08-24 1998-11-17 Metrika, Inc. Electronic assay device and method
US5512131A (en) 1993-10-04 1996-04-30 President And Fellows Of Harvard College Formation of microstamped patterns on surfaces and derivative articles
US5464741A (en) 1993-10-08 1995-11-07 Henwell, Inc. Palladium (II) octaethylporphine alpha-isothiocyanate as a phosphorescent label for immunoassays
KR0177182B1 (ko) 1993-10-20 1999-05-15 최근선 중공구조를 갖는 유화중합체의 제조방법
US5352582A (en) 1993-10-28 1994-10-04 Hewlett-Packard Company Holographic based bio-assay
US5455475A (en) 1993-11-01 1995-10-03 Marquette University Piezoelectric resonant sensor using the acoustoelectric effect
EP0653639B1 (en) 1993-11-12 2000-03-22 Unilever Plc Analytical devices and methods of use thereof
DK0653625T3 (da) 1993-11-12 2003-01-13 Inverness Medical Switzerland Aflæseindretninger til teststrimler
US5527711A (en) 1993-12-13 1996-06-18 Hewlett Packard Company Method and reagents for binding chemical analytes to a substrate surface, and related analytical devices and diagnostic techniques
JP3504750B2 (ja) 1993-12-22 2004-03-08 オルソ−クリニカル ダイアグノスティクス,インコーポレイティド 検量関係式の再校正法及び定量試験キット
US5663213A (en) 1994-02-28 1997-09-02 Rohm And Haas Company Method of improving ultraviolet radiation absorption of a composition
GB9416002D0 (en) * 1994-08-08 1994-09-28 Univ Cranfield Fluid transport device
US6117090A (en) 1994-08-25 2000-09-12 Caillouette; James C. Method and apparatus for detecting amine producing organisms in the vagina
US5599668A (en) 1994-09-22 1997-02-04 Abbott Laboratories Light scattering optical waveguide method for detecting specific binding events
ATE210298T1 (de) 1994-09-23 2001-12-15 Unilever Nv Überwachungsverfahren und dazu verwendbare vorrichtungen
US5620850A (en) 1994-09-26 1997-04-15 President And Fellows Of Harvard College Molecular recognition at surfaces derivatized with self-assembled monolayers
US5571684A (en) 1994-11-07 1996-11-05 Litmus Concepts, Inc. Assay for proline iminopeptidase and other hydrolytic activities
US5728352A (en) 1994-11-14 1998-03-17 Advanced Care Products Disposable electronic diagnostic instrument
KR0151203B1 (ko) 1994-12-08 1998-12-01 이헌조 다중전극형 바이오센서
US5866434A (en) * 1994-12-08 1999-02-02 Meso Scale Technology Graphitic nanotubes in luminescence assays
US5489988A (en) 1995-01-03 1996-02-06 Motorola Environmental sensor and method therefor
AU4213396A (en) 1995-01-26 1996-08-01 Nippon Paint Co., Ltd. Kit for immunologically assaying biological substance and assay process
US5569608A (en) 1995-01-30 1996-10-29 Bayer Corporation Quantitative detection of analytes on immunochromatographic strips
FR2730810B1 (fr) 1995-02-21 1997-03-14 Thomson Csf Capteur chimique hautement selectif
DE69600924T2 (de) * 1995-02-21 1999-06-10 Iqbal W. Dr. Brea Calif. Siddiqi Apparat und verfahren zum mischen und trennen durch verwendung von magnetischen teilchen
US5534132A (en) 1995-05-04 1996-07-09 Vreeke; Mark Electrode and method for the detection of an affinity reaction
KR0156176B1 (ko) 1995-06-01 1998-12-01 구자홍 전기화학식 면역 바이오센서
AU6378696A (en) 1995-06-05 1996-12-24 Kimberly-Clark Worldwide, Inc. Novel pre-dyes
US6413410B1 (en) 1996-06-19 2002-07-02 Lifescan, Inc. Electrochemical cell
AU3094195A (en) 1995-07-10 1997-02-10 Donald L. Kramer Light transmittance type analytical system, variable transmittance optical component, and test device
US5518689A (en) 1995-09-05 1996-05-21 Bayer Corporation Diffused light reflectance readhead
AUPN527995A0 (en) 1995-09-07 1995-09-28 Agen Biomedical Limited Method and apparatus for semiquantification of an analyte
US5837547A (en) 1995-12-27 1998-11-17 Caribbean Microparticles Corporation Flow cytometer calibration method
US6287871B1 (en) 1996-03-19 2001-09-11 University Of Utah Research Foundation System for determining analyte concentration
CA2250684A1 (en) 1996-03-29 1997-10-09 Donald Elliott Brooks Platelet count assay using platelet granule proteins
US5753517A (en) * 1996-03-29 1998-05-19 University Of British Columbia Quantitative immunochromatographic assays
US6387707B1 (en) * 1996-04-25 2002-05-14 Bioarray Solutions Array Cytometry
ES2121565T6 (es) 1996-05-17 1998-11-16 Mercury Diagnostics Inc Elemento desechable para uso en un dispositivo de toma de muestras de fluidos corporales.
US5951492A (en) 1996-05-17 1999-09-14 Mercury Diagnostics, Inc. Methods and apparatus for sampling and analyzing body fluid
DE19622458C2 (de) 1996-05-24 1998-03-26 Senslab Ges Zur Entwicklung Un Enzymatisch-elektrochemischer Einschritt-Affinitätssensor zur quantitativen Bestimmung von Analyten in wäßrigen Medien und Affinitätsassay
DE19621133A1 (de) * 1996-05-24 1997-11-27 Boehringer Mannheim Gmbh Bestimmungsverfahren mit oligomerisierten Rezeptoren
DE69709921T2 (de) * 1996-05-28 2002-08-22 Zeptosens Ag, Witterswil Optische detektionsvorrichtung für chemische analysen an kleinvolumigen proben
US5852229A (en) 1996-05-29 1998-12-22 Kimberly-Clark Worldwide, Inc. Piezoelectric resonator chemical sensing device
US6004530A (en) 1996-06-04 1999-12-21 Roche Diagnostics Gmbh Use of metallo-porphyrin conjugates for the detection of biological substances
US6444423B1 (en) 1996-06-07 2002-09-03 Molecular Dynamics, Inc. Nucleosides comprising polydentate ligands
US5876944A (en) * 1996-06-10 1999-03-02 Bayer Corporation Method for amplification of the response signal in a sandwich immunoassay
EP0910790A1 (en) * 1996-07-10 1999-04-28 Cambridge Imaging Limited Improvements in and relating to imaging
US5660790A (en) * 1996-08-13 1997-08-26 Litmus Concepts, Inc. PH and amine test elements
US6020047A (en) 1996-09-04 2000-02-01 Kimberly-Clark Worldwide, Inc. Polymer films having a printed self-assembling monolayer
US6194220B1 (en) * 1996-09-25 2001-02-27 Becton, Dickinson And Company Non-instrumented assay with quantitative and qualitative results
US5798273A (en) 1996-09-25 1998-08-25 Becton Dickinson And Company Direct read lateral flow assay for small analytes
US5910940A (en) * 1996-10-08 1999-06-08 Polaroid Corporation Storage medium having a layer of micro-optical lenses each lens generating an evanescent field
US6165798A (en) 1996-10-10 2000-12-26 University Of British Columbia Optical quantification of analytes in membranes
US5922537A (en) * 1996-11-08 1999-07-13 N.o slashed.AB Immunoassay, Inc. Nanoparticles biosensor
US6048623A (en) 1996-12-18 2000-04-11 Kimberly-Clark Worldwide, Inc. Method of contact printing on gold coated films
US5922550A (en) 1996-12-18 1999-07-13 Kimberly-Clark Worldwide, Inc. Biosensing devices which produce diffraction images
US5962995A (en) 1997-01-02 1999-10-05 Applied Advanced Technologies, Inc. Electron beam accelerator
US6407492B1 (en) * 1997-01-02 2002-06-18 Advanced Electron Beams, Inc. Electron beam accelerator
US5827748A (en) 1997-01-24 1998-10-27 The United States Of America As Represented By The Secretary Of The Navy Chemical sensor using two-dimensional lens array
EP0859230A1 (en) 1997-02-10 1998-08-19 Cranfield University Detection of analytes using electrochemistry
US6391558B1 (en) * 1997-03-18 2002-05-21 Andcare, Inc. Electrochemical detection of nucleic acid sequences
US6180288B1 (en) 1997-03-21 2001-01-30 Kimberly-Clark Worldwide, Inc. Gel sensors and method of use thereof
US6235471B1 (en) * 1997-04-04 2001-05-22 Caliper Technologies Corp. Closed-loop biochemical analyzers
EP0872736A1 (en) * 1997-04-18 1998-10-21 Byk Gulden Italia S.p.A. Assay utilizing magnetic particles
US6103536A (en) 1997-05-02 2000-08-15 Silver Lake Research Corporation Internally referenced competitive assays
US6171780B1 (en) * 1997-06-02 2001-01-09 Aurora Biosciences Corporation Low fluorescence assay platforms and related methods for drug discovery
US6613583B1 (en) 1997-06-27 2003-09-02 Igen International, Inc. Electrochemiluminescent label based on multimetallic assemblies
US6136611A (en) 1997-07-31 2000-10-24 Research International, Inc. Assay methods and apparatus
EP0898169B1 (en) 1997-08-11 2002-02-06 F. Hoffmann-La Roche Ag Microparticle enhanced light scattering assay and microparticle reagents therefor
US6080391A (en) * 1997-08-14 2000-06-27 Novo Nordisk A/S Reduction of malodour
PL338879A1 (en) 1997-08-29 2000-11-20 Fertility Acoustics Inc Method of and apparatus for rapidly analysing analytes in biological samples
US5906921A (en) 1997-09-29 1999-05-25 Matsushita Electric Industrial Co., Ltd. Biosensor and method for quantitative measurement of a substrate using the same
US6103537A (en) * 1997-10-02 2000-08-15 Aclara Biosciences, Inc. Capillary assays involving separation of free and bound species
US6617488B1 (en) 1997-10-14 2003-09-09 Indicator Technologies, Inc. Method and apparatus for indicating the conditions in an absorbent article
US6174646B1 (en) * 1997-10-21 2001-01-16 Konica Corporation Image forming method
US6087184A (en) 1997-11-10 2000-07-11 Beckman Coulter, Inc. Opposable-element chromatographic assay device for detection of analytes
US6030792A (en) * 1997-11-13 2000-02-29 Pfizer Inc Assays for measurement of protein fragments in biological media
US5997817A (en) 1997-12-05 1999-12-07 Roche Diagnostics Corporation Electrochemical biosensor test strip
US6074725A (en) * 1997-12-10 2000-06-13 Caliper Technologies Corp. Fabrication of microfluidic circuits by printing techniques
EP1046027A1 (en) 1997-12-11 2000-10-25 Quidel Corporation One-step fluorescent immunosensor test
US6060256A (en) * 1997-12-16 2000-05-09 Kimberly-Clark Worldwide, Inc. Optical diffraction biosensor
SE9704933D0 (sv) 1997-12-30 1997-12-30 Pharmacia & Upjohn Diag Ab Metod som utnyttjar en ny kalibrator och test kit som innehåller kalibratorn
ATE239801T1 (de) * 1998-01-22 2003-05-15 Luminex Corp Mikropartikel mit multiplen fluoreszenz-signalen
DE19811622A1 (de) 1998-03-17 1999-09-23 Lre Technology Partner Gmbh Meßgerät zur Bestimmung der Konzentration einer Substanz in einer Flüssigkeit
JP2003522621A (ja) 1998-03-19 2003-07-29 マックス−プランク−ゲゼルシャフト・ツア・フェルデルング・デア・ヴィッセンシャフテン・エー・ファオ 分解性コロイド原型上のナノ複合多層の静電的自己集成体による多層被覆粒子及び中空シェルの製造
US6368873B1 (en) * 1998-04-09 2002-04-09 Applied Biotech, Inc. Identification of human urine for drug testing
US6241863B1 (en) 1998-04-27 2001-06-05 Harold G. Monbouquette Amperometric biosensors based on redox enzymes
US6451607B1 (en) 1998-05-07 2002-09-17 Litmus Concepts, Inc. External dried-reagent control for analytical test devices
EP0959176B1 (en) 1998-05-18 2012-09-05 Rohm And Haas Company Hollow sphere organic pigment for paper or paper coatings
JPH11326603A (ja) * 1998-05-19 1999-11-26 Seiko Epson Corp マイクロレンズアレイ及びその製造方法並びに表示装置
WO1999064864A1 (en) 1998-06-12 1999-12-16 New Horizons Diagnostics Inc. Optimizing sensitivity in colloidal colorimetric flow through and lateral flow tests
US6030840A (en) * 1998-06-15 2000-02-29 Nen Life Sciences, Inc. Neutral enhancement of lanthanides for time resolved fluorescence
US6183972B1 (en) * 1998-07-27 2001-02-06 Bayer Corporation Method for the determination of analyte concentration in a lateral flow sandwich immunoassay exhibiting high-dose hook effect
US6171870B1 (en) * 1998-08-06 2001-01-09 Spectral Diagnostics, Inc. Analytical test device and method for use in medical diagnoses
US6281006B1 (en) 1998-08-24 2001-08-28 Therasense, Inc. Electrochemical affinity assay
US7640083B2 (en) 2002-11-22 2009-12-29 Monroe David A Record and playback system for aircraft
AU6275699A (en) 1998-09-29 2000-04-17 Fertility Acoustics Inc. A method of and device for determining ovulation in mammals
GB9821526D0 (en) * 1998-10-02 1998-11-25 Genosis Inc Capture assay
US6284472B1 (en) 1998-10-05 2001-09-04 Dade Behring Inc. Method for extending the range of an immunoassay
US6338790B1 (en) 1998-10-08 2002-01-15 Therasense, Inc. Small volume in vitro analyte sensor with diffusible or non-leachable redox mediator
BE1012241A3 (fr) 1998-10-21 2000-08-01 D Tek Procede de depistage d'analyte et trousse pour la mise en oeuvre d'un tel procede.
FI982422A0 (fi) * 1998-11-09 1998-11-09 Arctic Diagnostics Oy Porfyriiniyhdisteitä, niiden konjugaatit sekä määritysmenetelmiä pohjautuen näiden konjugaattien käyttöön
US6261779B1 (en) * 1998-11-10 2001-07-17 Bio-Pixels Ltd. Nanocrystals having polynucleotide strands and their use to form dendrimers in a signal amplification system
CA2254223A1 (en) * 1998-11-16 2000-05-16 Biophys, Inc. Device and method for analyzing a biologic sample
US6455861B1 (en) 1998-11-24 2002-09-24 Cambridge Research & Instrumentation, Inc. Fluorescence polarization assay system and method
US6221579B1 (en) * 1998-12-11 2001-04-24 Kimberly-Clark Worldwide, Inc. Patterned binding of functionalized microspheres for optical diffraction-based biosensors
US6579673B2 (en) 1998-12-17 2003-06-17 Kimberly-Clark Worldwide, Inc. Patterned deposition of antibody binding protein for optical diffraction-based biosensors
EP1161490A4 (en) 1999-02-05 2003-04-09 Univ Maryland NANOPARTICLES IN LIEU OF LUMINESCENCE PROBES
WO2000047983A1 (en) 1999-02-11 2000-08-17 University Of Southern California Enzyme-linked immuno-magnetic electrochemical biosensor
US6696304B1 (en) * 1999-02-24 2004-02-24 Luminex Corporation Particulate solid phase immobilized protein quantitation
US6585939B1 (en) * 1999-02-26 2003-07-01 Orchid Biosciences, Inc. Microstructures for use in biological assays and reactions
AU3504700A (en) 1999-02-26 2000-09-14 Fertility Acoustics Inc. Analyzing strip having a fluid cell and a method of analyzing a sample
WO2000052456A1 (en) 1999-03-02 2000-09-08 Helix Biopharma Corporation Biosensor device and method
US6287783B1 (en) 1999-03-18 2001-09-11 Biostar, Inc. Optical assay device and method
US6511814B1 (en) 1999-03-26 2003-01-28 Idexx Laboratories, Inc. Method and device for detecting analytes in fluids
US6815218B1 (en) 1999-06-09 2004-11-09 Massachusetts Institute Of Technology Methods for manufacturing bioelectronic devices
WO2000078917A1 (en) * 1999-06-18 2000-12-28 Umedik, Inc. Device and method for analyzing a biologic sample
US6294392B1 (en) 1999-07-21 2001-09-25 The Regents Of The University Of California Spatially-encoded analyte detection
US6372895B1 (en) * 2000-07-07 2002-04-16 3M Innovative Properties Company Fluorogenic compounds
JP3586243B2 (ja) 1999-09-29 2004-11-10 独立行政法人 科学技術振興機構 高感度イムノアッセイ法
US6306665B1 (en) * 1999-10-13 2001-10-23 A-Fem Medical Corporation Covalent bonding of molecules to an activated solid phase material
US6136549A (en) 1999-10-15 2000-10-24 Feistel; Christopher C. systems and methods for performing magnetic chromatography assays
USD450854S1 (en) 1999-11-04 2001-11-20 Therasense, Inc. Glucose strip
US6670115B1 (en) 1999-11-24 2003-12-30 Biotronic Technologies, Inc. Devices and methods for detecting analytes using electrosensor having capture reagent
US6331438B1 (en) 1999-11-24 2001-12-18 Iowa State University Research Foundation, Inc. Optical sensors and multisensor arrays containing thin film electroluminescent devices
US6399295B1 (en) 1999-12-17 2002-06-04 Kimberly-Clark Worldwide, Inc. Use of wicking agent to eliminate wash steps for optical diffraction-based biosensors
US6509196B1 (en) 2000-01-04 2003-01-21 Response Biomedical Corp. Compensation for non-specific signals in quantitative immunoassays
US6255066B1 (en) * 2000-02-08 2001-07-03 Allan L. Louderback Bacterial vaginosis screening technique and a diagnostic kit for use therein
US20010055776A1 (en) 2000-02-11 2001-12-27 Dale Greenwalt High throughput cell-based assay kits
NZ521534A (en) 2000-02-23 2004-10-29 Besst Test Aps Method for correlating blood coagulation activity with markers in urine
US6607922B2 (en) 2000-03-17 2003-08-19 Quantum Design, Inc. Immunochromatographic assay method and apparatus
US6436722B1 (en) * 2000-04-18 2002-08-20 Idexx Laboratories, Inc. Device and method for integrated diagnostics with multiple independent flow paths
WO2001098785A2 (en) 2000-06-19 2001-12-27 Arizona Board Of Regents Rapid flow-based immunoassay microchip
EP1311839B1 (en) 2000-06-21 2006-03-01 Bioarray Solutions Ltd Multianalyte molecular analysis using application-specific random particle arrays
DE10042023C2 (de) 2000-08-08 2003-04-10 Biognostic Ag Kapseln, die feste Teilchen signalerzeugender Substanzen einkapseln, und deren Verwendung bei Bioassays zum Nachweis von Zielmolekülen in einer Probe
US6720007B2 (en) * 2000-10-25 2004-04-13 Tufts University Polymeric microspheres
US20020164659A1 (en) 2000-11-30 2002-11-07 Rao Galla Chandra Analytical methods and compositions
DE10062062C1 (de) 2000-12-13 2002-02-28 Draegerwerk Ag Elektrochemischer Sensor
US20030162236A1 (en) 2001-03-26 2003-08-28 Response Biomedical Corporation Compensation for variability in specific binding in quantitative assays
JP2002303629A (ja) 2001-04-06 2002-10-18 Matsushita Electric Ind Co Ltd 免疫クロマトデバイス及びそれを用いた被検物質測定方法
WO2003005013A1 (en) 2001-07-03 2003-01-16 Georgia Tech Research Corporation Filtration-based microarray chip
US6818456B2 (en) 2001-07-20 2004-11-16 Varian, Inc. Color contrast system for lateral flow immunoassay tests
US20030119203A1 (en) 2001-12-24 2003-06-26 Kimberly-Clark Worldwide, Inc. Lateral flow assay devices and methods for conducting assays
AU2002357754A1 (en) 2001-12-24 2003-07-24 Kimberly-Clark Worldwide, Inc. Flow-through assay with an internal calibration system using polyelectrolyte
US8367013B2 (en) 2001-12-24 2013-02-05 Kimberly-Clark Worldwide, Inc. Reading device, method, and system for conducting lateral flow assays
US7214427B2 (en) 2002-03-21 2007-05-08 Aviva Biosciences Corporation Composite beads comprising magnetizable substance and electro-conductive substance
US7432105B2 (en) 2002-08-27 2008-10-07 Kimberly-Clark Worldwide, Inc. Self-calibration system for a magnetic binding assay
US7314763B2 (en) 2002-08-27 2008-01-01 Kimberly-Clark Worldwide, Inc. Fluidics-based assay devices
US7285424B2 (en) 2002-08-27 2007-10-23 Kimberly-Clark Worldwide, Inc. Membrane-based assay devices
US20040106190A1 (en) 2002-12-03 2004-06-03 Kimberly-Clark Worldwide, Inc. Flow-through assay devices
US20040121334A1 (en) 2002-12-19 2004-06-24 Kimberly-Clark Worldwide, Inc. Self-calibrated flow-through assay devices
US7247500B2 (en) 2002-12-19 2007-07-24 Kimberly-Clark Worldwide, Inc. Reduction of the hook effect in membrane-based assay devices
US20040197819A1 (en) 2003-04-03 2004-10-07 Kimberly-Clark Worldwide, Inc. Assay devices that utilize hollow particles
US20050112703A1 (en) 2003-11-21 2005-05-26 Kimberly-Clark Worldwide, Inc. Membrane-based lateral flow assay devices that utilize phosphorescent detection
US7943395B2 (en) 2003-11-21 2011-05-17 Kimberly-Clark Worldwide, Inc. Extension of the dynamic detection range of assay devices
US20050136500A1 (en) 2003-12-19 2005-06-23 Kimberly-Clark Worldwide; Inc. Flow-through assay devices
US20050136550A1 (en) 2003-12-19 2005-06-23 Kimberly-Clark Worldwide, Inc. Flow control of electrochemical-based assay devices
US7943089B2 (en) 2003-12-19 2011-05-17 Kimberly-Clark Worldwide, Inc. Laminated assay devices
US20050191704A1 (en) 2004-03-01 2005-09-01 Kimberly-Clark Worldwide, Inc. Assay devices utilizing chemichromic dyes
US20050244953A1 (en) 2004-04-30 2005-11-03 Kimberly-Clark Worldwide, Inc. Techniques for controlling the optical properties of assay devices

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106153924A (zh) * 2015-03-23 2016-11-23 中国科学院宁波材料技术与工程研究所 试剂盒、检测系统,其制备方法及应用
CN106153924B (zh) * 2015-03-23 2017-10-27 中国科学院宁波材料技术与工程研究所 试剂盒、检测系统,其制备方法及应用
CN112534039A (zh) * 2018-08-06 2021-03-19 贝克顿·迪金森公司 带有分离膜的侧向流动免疫测定设备

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US20080014659A1 (en) 2008-01-17
US7662643B2 (en) 2010-02-16
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