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1. 发明申请

WO2007081635A2 METHOD AND APPARATUS FOR ANALYZING ARSENIC CONCENTRATIONS USING GAS PHASE OZONE CHEMILUMINESCENCE 审中-公开
标题翻译：使用气相色谱分析分析浓度浓度的方法和装置
公开(公告)号：WO2007081635A2
公开(公告)日：2007-07-19
申请号：PCT/US2006/062016
申请日：2006-12-13
申请人： TEXAS TECH UNIVERSITY , DASGUPTA, Purnendu Kumar , IDOWU, Ademola David , LI, Jianzhong
发明人： DASGUPTA, Purnendu Kumar , IDOWU, Ademola David , LI, Jianzhong
CPC分类号： G01N35/085 , G01N21/76 , G01N33/0013 , G01N33/18
摘要： A method of detecting arsenic comprising acidifying at least one sample comprising a known arsenic concentration, reducing arsenic in the sample having the known arsenic concentration to arsine, contacting the arsine in the sample having the known arsenic concentration with a reagent to produce a chemiluminescent emission, measuring the intensity of chemiluminescent emission produced by the sample having the known arsenic concentration, acidifying at least one sample comprising an unknown arsenic concentration, reducing arsenic in the sample having the unknown arsenic concentration to arsine, contacting the arsine in the sample having the unknown arsenic concentration with a photoagent to produce a chemiluminescent emission, measuring the intensity of chemiluminescence emission produced by the sample having the unknown arsenic concentration, and determining the arsenic content in the sample having an unknown arsenic concentration by comparing the intensity of chemiluminescent emission of the sample comprising a known arsenic concentration to the chemiluminescent emission of the sample comprising an unknown arsenic concentration, wherein the arsine is not subjected to a low-temperature trap prior to the reaction with a photoagent.
摘要翻译：一种检测砷的方法，包括使包含已知砷浓度的至少一种样品酸化，将具有已知砷浓度的样品中的砷还原为胂，将具有已知砷浓度的样品中的胂与试剂接触以产生化学发光发射，测量具有已知砷浓度的样品产生的化学发光发射的强度，酸化至少一种包含未知砷浓度的样品，将具有未知砷浓度的样品中的砷还原为胂，使具有未知砷的样品中的胂接触浓度与产生化学发光，测量具有未知砷浓度的样品产生的化学发光强度，并通过比较化学发光发射强度来确定砷浓度未知砷的砷含量的样品包含已知砷浓度至包含未知砷浓度的样品的化学发光发射，其中胂在与光引发剂反应之前不经受低温阱。

2. 发明申请

WO2007081635A3 METHOD AND APPARATUS FOR ANALYZING ARSENIC CONCENTRATIONS USING GAS PHASE OZONE CHEMILUMINESCENCE 审中-公开
标题翻译：使用气相色谱分析分析浓度浓度的方法和装置
公开(公告)号：WO2007081635A3
公开(公告)日：2007-09-27
申请号：PCT/US2006062016
申请日：2006-12-13
申请人： UNIV TEXAS TECH , DASGUPTA PURNENDU KUMAR , IDOWU ADEMOLA DAVID , LI JIANZHONG
发明人： DASGUPTA PURNENDU KUMAR , IDOWU ADEMOLA DAVID , LI JIANZHONG
IPC分类号： G01N21/76 , G01N33/18 , G01N35/08
CPC分类号： G01N35/085 , G01N21/76 , G01N33/0013 , G01N33/18
摘要： A practical sequential injection/zone fluidicsbased analyzer that measures waterborne arsenic is capable of differentiating between inorganic As(III) and As(V). The principle is based on generating AsH 3 from the sample in a confined chamber (10) by borohydride reduction at controlled pH, sparging the chamber to drive the AsH 3 to a small reflective cell (70) located atop a photomultiplier tube (50), allowing it to react with ozone generated from ambient air, and measuring the intense chemiluminescence that results. Arsine generation and removal from solution results in isolation from the sample matrix, avoiding the pitfalls encountered in some solution-based analysis techniques. The differential determination of As(III) and As(V) is based on the different pH dependence of the reducibility of these species to AsH 3 . At pH 4 . At a pH of 4 - 5, only As(III) is converted to arsine. In the present form, the limit of detection (S/N = 3) is 0.05 µg/L As at pH = 1 and 0.09 µg/L As(III) at pH ~4 - 5 for a 3-mL sample. The analyzer is intrinsically automated and requires 4 min per determination. In a further embodiment, electrochemical reduction at Cd cathode is used instead of NaBH 4
摘要翻译：测量水中砷的实用顺序注入/区域流体分析仪能够区分无机As（III）和As（V）。该原理是基于在受限制的pH下通过硼氢化钠还原在限制室（10）中从样品中产生AsH 3 3，喷射室以驱动AsH 3 < 反射池（70）位于光电倍增管（50）的顶部，使其与从环境空气产生的臭氧反应，并测量产生的强烈的化学发光。胂生成和从溶液中的去除导致与样品基质的分离，避免了在某些基于溶液的分析技术中遇到的陷阱。 As（III）和As（V）的差异测定是基于这些物质与AsH 3 N 3的还原性的不同pH依赖性。在pH <1时，在NaBH 4 N 3存在下，As（III）和As（V）均可定量转化为胂。在pH为4-5时，只有As（III）转化为胂。在本形式中，对于3-mL样品，检测限（S / N = 3）为0.05μg/ L As，在pH = 1和0.09μg/ L As（III）在pH4-5。分析仪本质上是自动化的，每次测定需要4分钟。在另一个实施方案中，使用Cd阴极处的电化学还原代替NaBH 4

3. 发明申请

WO2005022059A2 DENUDER ASSEMBLY FOR COLLECTION AND REMOVAL OF SOLUBLE ATMOSPHERIC GASES 审中-公开
标题翻译：用于收集和清除可溶性大气气体的DENUDER组件
公开(公告)号：WO2005022059A2
公开(公告)日：2005-03-10
申请号：PCT/US2004027314
申请日：2004-08-19
申请人： DIONEX CORP , DASGUPTA PURNENDU K , MORRIS KAVIN J , LI JIANZHONG
发明人： DASGUPTA PURNENDU K , MORRIS KAVIN J , LI JIANZHONG
IPC分类号： B01D53/22 , G01N1/22 , G01N1/34 , F25J
CPC分类号： B01D53/228 , G01N1/2202 , G01N1/2214 , G01N1/2273 , G01N2001/2217 , G01N2001/4016 , G01N2015/0687
摘要： A denuder assembly is adapted for the collection and removal of a gaseous analyte from a sample gas. The denuder includes a housing including an internal cavity, a sample gas inlet fluidly coupled with a sample gas source, a denuder liquid inlet fluidly coupled with a denuder liquid source, a barrier sheet extending across the internal cavity and separating the internal cavity into a liquid reservoir and a gas flow-through channel fluidly coupled with and downstream of the sample gas inlet, the barrier sheet having a liquid-reservoir surface and a gas-channel surface and being porous to gas and liquid; and a denuder liquid disposed in the liquid reservoir and permeating the barrier sheet to coat the gas-channel surface of the barrier sheet thereby allowing the denuder liquid on the gas-channel surface to contact the sample gas flowing within the gas flow-through channel and allowing the analyte to diffuse through the barrier sheet into the liquid reservoir. A method of using the denuder assembly for collection and removal of soluble atmospheric gases is also disclosed.
摘要翻译：紫外线组件适用于收集和去除样气中的气态分析物。该去矿物装置包括：壳体，其包括内腔，与样品气体源流体耦合的样品气体入口，与溶解液源流体耦合的溶蚀液体入口，跨过内腔延伸并将内腔分离成液体的阻挡片气体流通通道，所述气体流通通道与所述样品气体入口流体耦合并位于所述样品气体入口的下游，所述阻挡片具有液体储存器表面和气体通道表面并且对于气体和液体是多孔的; 以及布置在液体储存器中并渗透阻挡片以覆盖阻挡片的气体通道表面从而允许气体通道表面上的净化液接触在气体流通通道内流动的样本气体的净化液以及允许分析物通过阻挡片扩散到液体储存器中。还公开了一种使用紫外线组件收集和去除可溶性大气气体的方法。

4. 发明申请

WO2005022059A3 DENUDER ASSEMBLY FOR COLLECTION AND REMOVAL OF SOLUBLE ATMOSPHERIC GASES 审中-公开
公开(公告)号：WO2005022059A3
公开(公告)日：2005-03-10
申请号：PCT/US2004/027314
申请日：2004-08-19
申请人： DIONEX CORPORATION , DASGUPTA, Purnendu, K. , MORRIS, Kavin, J. , LI, Jianzhong
发明人： DASGUPTA, Purnendu, K. , MORRIS, Kavin, J. , LI, Jianzhong
IPC分类号： B01D53/22
摘要： A denuder assembly is adapted for the collection and removal of a gaseous analyte from a sample gas. The denuder includes a housing including an internal cavity, a sample gas inlet fluidly coupled with a sample gas source, a denuder liquid inlet fluidly coupled with a denuder liquid source, a barrier sheet extending across the internal cavity and separating the internal cavity into a liquid reservoir and a gas flow-through channel fluidly coupled with and downstream of the sample gas inlet, the barrier sheet having a liquid-reservoir surface and a gas-channel surface and being porous to gas and liquid; and a denuder liquid disposed in the liquid reservoir and permeating the barrier sheet to coat the gas-channel surface of the barrier sheet thereby allowing the denuder liquid on the gas-channel surface to contact the sample gas flowing within the gas flow-through channel and allowing the analyte to diffuse through the barrier sheet into the liquid reservoir. A method of using the denuder assembly for collection and removal of soluble atmospheric gases is also disclosed.

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