CN111239106A - 一种同轴雾化和超声波雾化串联的雾化装置 - Google Patents
一种同轴雾化和超声波雾化串联的雾化装置 Download PDFInfo
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Abstract
一种同轴雾化和超声波雾化串联的雾化装置,包括雾室、同轴气动雾化器和超声波雾化头,用于ICP‑AES或ICP‑MS试液的雾化。其特点是:在用玻璃制成的雾室上装上同轴气动雾化器和超声波雾化头,前者喷出的试液的部分粗雾滴在后者的超声波换能片上雾化为细雾滴,以此提高雾化效率。这个装置的优点是:气动雾化和超声波雾化并用,两种雾化器件装于同一雾室中,超声波雾化增量可调,可方便地提高检测灵敏度,其结构简单,成本低,维护、使用方便。
Description
技术领域
本发明涉及一种同轴雾化和超声波雾化串联的雾化装置,属于检测实验室仪器组件。
背景技术
电感耦合等离子体发射光谱仪/或质谱仪(ICP-AES 或 ICP-MS)是化学检测实验室常见的分析仪器。其为液体进样,经雾化器雾化后进入高温等离子体(ICP),而后进行发射光谱分析或质谱分析。雾化器的雾化率与仪器的灵敏度正相关。常见的ICP雾化器为同轴气动雾化器:高速氩气流从喷嘴环形间隙喷出,将从喷嘴正中同轴放置的毛细管输出的试液吹散破碎成雾状。此类雾化器结构简单、性能稳定、使用方便,但雾化率一般不足5%。目前也有用超声波雾化器的,此类雾化器雾化率高于同轴气动雾化器,但其结构复杂,价格高,维护、维修困难,应用不广泛。
发明内容
本发明可部分保持和发扬上述优点且可克服上述存在问题,提供一种结构简单、性能稳定、信号增量可调、便于与现有装置替换的用于ICP-AES或ICP-MS的同心雾化和超声波雾化串联装置。
本发明的技术解决方案如下。
1、雾室为旋流式雾室,在其近切线方向分别安装同轴气动雾化器和超声波雾化头,前者产生的气雾喷于后者的换能片的大银面(表面电极)上,粗雾滴部分被细化为细雾滴。工作时同轴气动雾化器的进液量为2 mL/min左右,换能片有效直径为16 mm左右且是可抗腐蚀的,雾室用玻璃制成、直径为50mm左右,同轴气动雾化器喷嘴至换能片中点的距离为40mm左右。
2、换能片装于换能头顶部,驱动电路输出功率在 0~100% 可调;在换能片的反面(即小银面,也就是驱动电极)通循环水冷却。
本发明与现有技术的相同点是:用气动雾化、超声波雾化技术对试液进行雾化。
本发明与现有技术不同的特征是:气动雾化和超声波雾化并用,两种雾化器件装于同一雾室中,超声波雾化增量可调,可方便地提高检测仪器的灵敏度,且结构简单,成本低,维护、使用方便。
附图说明
图1为本发明的总体示意图。
图2为图1中A-A的横截面示意图。
图3为本发明的各组件联接示意图。
在图1~图3中,雾室(1)、同轴气动雾化器(2)、超声波雾化头(3)、同轴气动雾化器插口(11)、超声波雾化头插口(12)、气雾出口(13)、废液出口(14)、O型圈(111)、换能片(31)、硅胶密封圈(32)、超声波雾化头壳体(33)、循环水进口(34)、循环水出口(35)、换能片驱动导线(36)、硅胶密封套(37)。
具体实施方式
参照图1~图3的形状、构造,按以下步骤实施。
1、雾室1:用玻璃制成,有同轴气动雾化器插口11和超声波雾化头插口12,前者内装O型圈111,可与同轴气动雾化器2紧密联接;后者用硅胶密封套37,可与超声波雾化头3紧密联接。雾室1的上、下分别设有气雾出口13和废液出口14,其旋流平面处的直径约50mm。
2、同轴气动雾化器2:使用与雾室1联接处的直径为6mm、进液量为2mL/min左右者。
3、超声波雾化头3:用硬质塑料制成圆筒型壳体,顶端装硅胶密封圈32,圈内装直径为16mm左右的换能片31;底端有循环水进口34和循环水出口35,换能片驱动导线36也从底端引入。
4、本发明的使用:试液经蠕动泵输入同轴气动雾化器2,在喷嘴处被高速氩气流吹散破碎成粒径大小不等的雾滴,一并喷向超声波雾化头3上的换能片31,部分粗雾滴细化成细雾滴;气雾在雾室1内形成旋流,粗雾滴与雾室1内壁碰撞后形成液膜,液体汇集后经废液出口14排出;细雾滴随气流从气雾出口13流向ICP或经去溶装置去溶后流向ICP。循环水进口34和循环水出口35的联接:用柔性管从ICP冷却水装置经节流阀后引入,或用蠕动泵单独提供。换能片31的大银面可抗腐蚀(例如涂覆玻璃陶瓷材料),小银面涂覆绝缘材料;其输出功率可根据主机测定灵敏度的需要在0~100%可调,谐振频率1.7 MHz。
注意事项:如果ICP前没有配置去溶装置,则通过调整驱动电路输出功率来调整超声波雾化贡献的测定信号增量至多在1倍左右为宜,大量溶剂的雾滴进入ICP ,会造成测定信号不稳定,甚至导致ICP 熄灭。如果配置了去溶装置,则可以更换进液量大的同轴气动雾化器2、用较大的蠕动泵速、增大超声波驱动功率,检测限可降低一个数量级。当待测物质的浓度大到不需要依靠超声波雾化来提高灵敏度时,调整驱动电路输出功率为0,相当于停用超声波雾化,整个装置便变成了单纯的同轴气动雾化装置。在工作时,超声波雾化头3循环水进、出口调为下进上出。
同轴气动雾化器2、换能片31及其驱动装置均有市售商品供应,可根据需要选配。
上述实施方式仅为本发明的优选实施方式,不能以此来限定本发明保护的范围,本领域的技术人员在本发明的基础上所做的任何非实质性的变化及替换,包括在其他需要对试液进行雾化的分析仪器上的变化及替换,均属于本发明所要求保护的范围。
Claims (1)
1.一种同轴雾化和超声波雾化串联的雾化装置,其特征在于:在雾室(1)的旋流平面上,在近切线方向上安装同轴气动雾化器(2)和换能片(31),前者的喷嘴对向后者的大银面(表面电极),把两者的雾化作用串联起来;雾室(1)用玻璃制成,直径为50mm左右;同轴气动雾化器(2)的喷嘴至换能片(31)中点的距离为40mm左右。
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Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5614438A (en) * | 1979-07-18 | 1981-02-12 | Hitachi Ltd | Manufacture of optical fiber base material |
CN2698458Y (zh) * | 2003-12-24 | 2005-05-11 | 马学军 | 一种对击雾化器 |
CN201524640U (zh) * | 2009-11-02 | 2010-07-14 | 邱永红 | 气动雾化与超声雾化相结合的高效雾化器 |
CN103794462A (zh) * | 2013-12-24 | 2014-05-14 | 苏州市奥普斯等离子体科技有限公司 | 一种超声波雾化等离子体处理装置 |
CN210465260U (zh) * | 2019-08-07 | 2020-05-05 | 广西科技大学鹿山学院 | 一种同轴雾化和超声波雾化串联的雾化装置 |
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Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5614438A (en) * | 1979-07-18 | 1981-02-12 | Hitachi Ltd | Manufacture of optical fiber base material |
CN2698458Y (zh) * | 2003-12-24 | 2005-05-11 | 马学军 | 一种对击雾化器 |
CN201524640U (zh) * | 2009-11-02 | 2010-07-14 | 邱永红 | 气动雾化与超声雾化相结合的高效雾化器 |
CN103794462A (zh) * | 2013-12-24 | 2014-05-14 | 苏州市奥普斯等离子体科技有限公司 | 一种超声波雾化等离子体处理装置 |
CN210465260U (zh) * | 2019-08-07 | 2020-05-05 | 广西科技大学鹿山学院 | 一种同轴雾化和超声波雾化串联的雾化装置 |
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