CN110940662B - 一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法 - Google Patents

一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法 Download PDF

Info

Publication number
CN110940662B
CN110940662B CN201911156835.5A CN201911156835A CN110940662B CN 110940662 B CN110940662 B CN 110940662B CN 201911156835 A CN201911156835 A CN 201911156835A CN 110940662 B CN110940662 B CN 110940662B
Authority
CN
China
Prior art keywords
tea
water
perchlorate
solution
detected
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201911156835.5A
Other languages
English (en)
Other versions
CN110940662A (zh
Inventor
孙荷芝
梁亚博
罗逢健
陈宗懋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Tea Research Institute Chinese Academy of Agricultural Sciences
Original Assignee
Tea Research Institute Chinese Academy of Agricultural Sciences
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tea Research Institute Chinese Academy of Agricultural Sciences filed Critical Tea Research Institute Chinese Academy of Agricultural Sciences
Priority to CN201911156835.5A priority Critical patent/CN110940662B/zh
Publication of CN110940662A publication Critical patent/CN110940662A/zh
Application granted granted Critical
Publication of CN110940662B publication Critical patent/CN110940662B/zh
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N21/78Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator producing a change of colour
    • GPHYSICS
    • G01MEASURING; TESTING
    • G01NINVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G01N21/77Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated by observing the effect on a chemical indicator
    • G01N2021/775Indicator and selective membrane

Landscapes

  • Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Plasma & Fusion (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)

Abstract

本发明一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法,具体包括以下步骤:(1)取水、茶汤和茶叶进行前处理,得到待测溶液,并在待测溶液中加入亚甲基蓝作为颜色指示剂;(2)调节步骤(1)得到的待测溶液pH至碱性进行显色反应,液液萃取后,静置,比色实现对水、茶汤及茶叶中高氯酸盐的快速可视化检测。本发明具有操作简单、灵敏度高、耗时短、成本低、重复性好等优点,可以在较短的时间内完成高氯酸盐可视化检测,方便进行现场实时监控,为水、茶汤及茶叶中高氯酸盐的定性测定提供技术支持,水、茶汤及茶叶中的检测限分别可达0.005mM、0.02mM和5 mg kg‑1

Description

一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法
技术领域
本发明属于检测技术领域,具体涉及一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法。
背景技术
高氯酸盐(ClO4 -)具有甲状腺毒性,因其水溶性较高,高氯酸盐常在水体环境中被检出,属于全球污染物,已受到学术界广泛关注,尤其是环境和食品领域。茶叶作为健康饮品广受国内外喜爱,其质量安全尤为重要,自2015年以来高氯酸盐作为茶叶新型污染物进入人们的视线,引起了对茶叶质量安全的强烈关注。迄今为止,多位研究者调查表明,茶叶中高氯酸盐检出率高于90%。
当前高氯酸盐的检测主要依赖于各种分析仪器,包括离子色谱(IC)、液相色谱质谱联用(LC-MS)、表面增强拉曼散射(SERS)、红外吸收光谱(IR)、拉曼光谱和毛细管电泳。虽然上述检测方法灵敏度和精确度较高,但大型仪器的使用、冗长的前处理过程使其难以开展现场实时监控。因此开发一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法尤为重要。
发明内容
针对上述现有技术中存在的问题,本发明的目的在于设计提供一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法,通过将待测液中加入亚甲基蓝作为颜色指示剂,在一定条件下进行显色反应,实现对水、茶汤及茶叶中高氯酸盐的快速可视化检测。
具体技术方案如下:
(1)取水、茶汤和茶叶进行前处理,得到待测溶液,并在待测溶液中加入亚甲基蓝作为颜色指示剂;
(2)调节步骤(1)得到的待测溶液pH至碱性进行显色反应,液液萃取后,静置,比色实现对水、茶汤及茶叶中高氯酸盐的快速可视化检测。
所述步骤(1)中水前处理为:水样品离心,取上清液;茶汤前处理为:取3 g茶叶,经150 mL沸水冲泡5 min后,离心取上清;茶叶前处理为:取2g茶叶,置于10-50mL水或0.1%-1%的甲酸水溶液中,超声提取3-10 min,离心取上清液5-10mL,加入0.01-0.5mL饱和醋酸铅,液液萃取后,取水相层。
所述步骤(1)中亚甲基蓝水溶液浓度为0.1-100mM,加入量为1μL-1mL。
所述步骤(1)中1 mL待测溶液中加入0.1-100 mM亚甲基蓝水溶液1 μL-1 mL。
所述步骤(2)中加入碱性物质调节pH至碱性,所述碱性物质包括但不限于氨水、氢氧化钠和三乙胺。
所述步骤(2)中显色反应条件为:在20-35℃反应1-5 min。
所述液液萃取为:加入0.5-2mL有机溶剂,剧烈摇晃1-3 min后,静置分层,其中有机溶剂包括乙酸乙酯、乙醚、二氯甲烷、氯仿中的一种。
本发明具有操作简单、灵敏度高、耗时短、成本低、重复性好等优点,可以在较短的时间内完成高氯酸盐可视化检测,方便进行现场实时监控,为水、茶汤及茶叶中高氯酸盐的定性测定提供技术支持,水、茶汤及茶叶中的检测限分别可达0.005mM、0.02mM和5 mg kg-1
附图说明
图1为显色反应对水中不同阴离子的选择特异性,从左到右为空白、ClO4 -、Cl-、H2PO4 -、HPO4 2-和SO4 2-
图2为显色反应的选择特异性。
具体实施方式
以下结合附图与各实施例来进一步说明本发明。
实施例一:水、茶汤和茶叶待测液的显色反应
(1)取水、茶汤和茶叶进行前处理,得到待测溶液,并在1mL待测溶液中加入0.1-100 mM亚甲基蓝水溶液1-10 mL,作为颜色指示剂。
水样品前处理:河水等水样品离心,取上清液;茶汤样品前处理:3 g茶叶经150 mL沸水冲泡5 min后,离心取上清,静置冷却至室温;茶叶样品前处理:取2g茶叶,置于10-50mL水或0.1%-1%的甲酸水溶液中,超声提取3-10 min,离心取上清液5-10mL,加入0.01-0.5mL饱和醋酸铅,液液萃取后,取水相层。
液液萃取方法为:加入0.5-2mL有机溶剂,剧烈摇晃1-3 min后,静置分层,其中有机溶剂包括乙酸乙酯、乙醚、二氯甲烷、氯仿中的一种。若茶叶提取液不进行净化处理,提取液中的色素及物质影响显色反应,导致检测灵敏度低。
(2)利用氨水、氢氧化钠、三乙胺等碱性物质调节步骤(1)得到的待测溶液pH至碱性,在20-35℃下反应1-5 min进行显色反应,再加入0.5-2 mL有机溶剂(乙酸乙酯、乙醚、二氯甲烷、氯仿中的一种),剧烈摇晃1-3 min后静置分层。若显蓝色,则表明含有高氯酸盐。
实施例二:显色反应条件优化
现有技术中亚甲基蓝溶液在酸性条件下与高氯酸盐可形成1:1复合物,在有机溶剂中显蓝色,而空白对照的有机溶剂呈浅蓝色,无法进行可视判定,需借助紫外可见仪器分析。为实现高氯酸盐的可视化分析,基于亚甲基蓝指示剂优化显色条件:指示剂浓度、指示剂添加量、反应温度、时间和溶液pH。当溶液pH > 7时,空白对照有机层显红色,而高氯酸盐实验组有机层显蓝色,从而实现高氯酸盐的可视化分析。如图1所示(数字为酸碱加入的体积分数,%):当加入1-10 %甲酸到亚甲基蓝溶液中时,空白对照组有机层显浅蓝色(图1a左),高氯酸盐实验组有机层显蓝色(图1b左);当加入1-10 %氨水时,空白对照组有机层显红色(图1a右),高氯酸盐实验组有机层显蓝色(图1b右)。最终显色反应如下:1 mL待测溶液中加入0.1-100 mM亚甲基蓝水溶液1 μL-1 mL, 利用氨水、氢氧化钠、三乙胺等碱性物质调节pH至碱性(pH > 7),在20-35℃反应1-5 min。
实施例三:显色反应的选择特异性
去离子水中添加相同浓度的不同阴离子(ClO4 -、Cl-、H2PO4 -、HPO4 2-、SO4 2-,均为钠盐化合物,0.5 mM),混合均匀,静置2h。取1 mL进行显色反应,加入0.1-100 mM亚甲基蓝水溶液1-10 mL, 利用氨水、氢氧化钠、三乙胺等碱性物质调节pH至碱性(pH > 7),在20-35℃反应1-5 min,再加入0.5-2 mL有机溶剂(乙酸乙酯、乙醚、二氯甲烷、氯仿中的一种),剧烈摇晃1-3 min后静置分层(图 2)。如图2所示,空白和其他阴离子的有机层显红色,仅高氯酸盐的有机层显蓝色,证实该显色反应对高氯酸盐具有良好的选择特异性。
实施例四:水、茶汤和茶叶待测液中显色反应的检测限
取空白水、茶汤和茶叶待测液,添加不同浓度高氯酸盐后,进行上述显色反应,比色确定其反应检测限。本发明的方法检测限在水中可达0.005 mM、茶汤中0.02 mM、茶叶中5mg/kg。
以上所述为本发明的较佳实施例,仅用于解释本发明,并不用于限定本发明,凡在本发明的精神和原则之内所做的任何修改、等同替换改进等,均应包含在本发明的保护范围之内。

Claims (1)

1.一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法,其特征在于包括以下步骤:
(1)取水、茶汤和茶叶进行前处理,得到待测溶液,并在待测溶液中加入亚甲基蓝作为颜色指示剂,1 mL待测溶液中加入0.1-100 mM亚甲基蓝水溶液1 μL-1 mL;
其中水前处理为:水样品离心,取上清液;茶汤前处理为:取3 g茶叶,经150 mL沸水冲泡5 min后,离心取上清;茶叶前处理为:取2g茶叶,置于10-50mL水或0.1%-1%的甲酸水溶液中,超声提取3-10 min,离心取上清液5-10mL,加入0.01-0.5mL饱和醋酸铅,液液萃取后,取水相层;
(2)利用碱性物质调节步骤(1)得到的待测溶液pH至碱性进行显色反应,液液萃取后,静置,当溶液pH>7时,含有高氯酸盐有机层显蓝色,空白对照有机层显红色,从而实现高氯酸盐的快速可视化检测;
所述碱性物质包括但不限于氨水、氢氧化钠和三乙胺;
所述显色反应条件为:在20-35℃反应1-5 min;
所述液液萃取为:加入0.5-2mL有机溶剂,剧烈摇晃1-3 min;
所述有机溶剂为乙酸乙酯、乙醚、二氯甲烷、氯仿中的一种。
CN201911156835.5A 2019-11-22 2019-11-22 一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法 Active CN110940662B (zh)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911156835.5A CN110940662B (zh) 2019-11-22 2019-11-22 一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911156835.5A CN110940662B (zh) 2019-11-22 2019-11-22 一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法

Publications (2)

Publication Number Publication Date
CN110940662A CN110940662A (zh) 2020-03-31
CN110940662B true CN110940662B (zh) 2022-11-04

Family

ID=69907565

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201911156835.5A Active CN110940662B (zh) 2019-11-22 2019-11-22 一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法

Country Status (1)

Country Link
CN (1) CN110940662B (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112903654B (zh) * 2021-01-19 2022-09-16 江苏大学 一种Cys-Ag/PDMS基底及其制备方法和茶叶中高氯酸盐的检测方法

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992149A (en) * 1975-02-18 1976-11-16 Calspan Corporation Colorimetric method for the analysis of residual anionic or cationic surfactants

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010086834A2 (en) * 2009-01-30 2010-08-05 Mistral Detection Ltd. Method and kit for identification of an explosive substance which contains an oxidant
CN101975777A (zh) * 2010-10-28 2011-02-16 四川大学 水样中氯酸盐的自动分析方法
RU2484461C2 (ru) * 2011-06-23 2013-06-10 Российская Федерация, от имени которой выступает государственное учреждение "Войсковая часть 35533" Способ экспресс-обнаружения неорганических и органических перхлоратов
WO2014128702A1 (en) * 2013-02-21 2014-08-28 Toxsorb Ltd. Perchlorate removal from aqueous industrial liquids
CN107247105B (zh) * 2017-07-10 2019-08-13 中国农业科学院茶叶研究所 一种固相萃取-高效液相色谱-串联质谱法检测茶叶中高氯酸盐的方法
CN110161028A (zh) * 2019-06-14 2019-08-23 西北师范大学 利用dllme和扫描仪数字图像分析测定食品中的高氯酸根的方法
CN110132955A (zh) * 2019-06-14 2019-08-16 酒泉市食品检验检测中心 分散液液微萃取-智能手机比色测定食品中高氯酸盐的方法

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3992149A (en) * 1975-02-18 1976-11-16 Calspan Corporation Colorimetric method for the analysis of residual anionic or cationic surfactants

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
Effect of alkali on methylene blue (C.I. Basic Blue 9) and other thiazine dyes;Andrew Mills et al;《Dyes and Pigments》;20100611;第88卷(第2期);第149-155页 *
变色瓶子实验褪色时间影响因素探究;张月娟等;《北京农业职业学院学报》;20180731;第32卷(第04期);第43-51页 *
环境中高氯酸盐分析方法研究进展;黄丹等;《化学推进剂与高分子材料》;20131231;第11卷(第06期);第30-34页 *
间接分光光度法对水中二氧化氯的测定;何明超等;《中国消毒学杂志》;20181215;第35卷(第12期);第886-889页 *

Also Published As

Publication number Publication date
CN110940662A (zh) 2020-03-31

Similar Documents

Publication Publication Date Title
Guo et al. Simultaneous spectrophotometric determination of trace copper, nickel, and cobalt ions in water samples using solid phase extraction coupled with partial least squares approaches
Divrikli et al. Preconcentration of Pb (II), Cr (III), Cu (II), Ni (II) and Cd (II) ions in environmental samples by membrane filtration prior to their flame atomic absorption spectrometric determinations
Soylak et al. Determination of trace amounts of cobalt in natural water samples as 4-(2-thiazolylazo) recorcinol complex after adsorptive preconcentration
Zeng et al. Room temperature ionic liquids enhanced the speciation of Cr (VI) and Cr (III) by hollow fiber liquid phase microextraction combined with flame atomic absorption spectrometry
Hu et al. Study on determination of iron, cobalt, nickel, copper, zinc and manganese in drinking water by solid-phase extraction and RP-HPLC with 2-(2-quinolinylazo)-5-diethylaminophenol as precolumn derivatizing reagent
Yahyavi et al. Recent developments in methods of analysis for fluoride determination
Talio et al. Sequential determination of lead and cobalt in tap water and foods samples by fluorescence
Khan et al. A simple separation/preconcentration method for the determination of aluminum in drinking water and biological sample
Nesterenko et al. Fast direct determination of strontium in seawater using high-performance chelation ion chromatography
CN110940662B (zh) 一种水、茶汤及茶叶中高氯酸盐的快速可视化检测方法
Rao et al. Overview of analytical methodologies for sea water analysis: Part I—Metals
Kolotyrkina et al. Shipboard flow injection method for the determination of manganese in sea-water using in-valve preconcentration and catalytic spectrophotometric detection
Liang et al. Flow injection analysis of nanomolar level orthophosphate in seawater with solid phase enrichment and colorimetric detection
Jafarvand et al. Dispersive liquid–liquid microextraction of silver prior to determination by microsample introduction-flame atomic absorption spectrometry
Arvand et al. Dispersive liquid-liquid microextraction of Fe (II) and Cu (II) with diethyldithiocarbamate and their simultaneous spectrophotometric determination using mean centering of ratio spectra
Manzoori∗ et al. Preconcentration and spectrophotometric determination of chromium (VI) and total chromium in drinking water by the sorption of chromium diphenylcarbazone with surfactant coated alumina
CN105334283B (zh) 离子色谱法同时测定再造烟叶中草酸根、琥珀酸根、硫酸根和磷酸根的样品前处理方法
CN108802234B (zh) 一种粉煤灰中铵根离子含量的测定方法
Sun et al. Determination of chromium (III) and total chromium in water by derivative atomic absorption spectrometry using flow injection on-line preconcentration with a double microcolumn
Meléndez et al. Direct chromatographic separation and quantification of calcium and magnesium in seawater and sediment porewaters
CN106324169A (zh) 葡萄酒中酰胺类杀菌剂的固相萃取‑气相色谱‑串联质谱检测方法
Li et al. Rapid determination of trace Cu 2+ by an in-syringe membrane SPE and membrane solid-phase spectral technique
Sakai et al. Effect of arsenious and arsenic acids on the chemiluminescence of luminol in the absence of hydrogen peroxide and its analytical application
RU2567844C1 (ru) Способ определения селена(iv)
Kawaguchi et al. Determination of Ultrace Indium in Water Sample by Electrothermal Atomic Absorption Spectrometry after Preconcentration with Solvent Extraction and Back Extraction.

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant