氢化物发生与扇形磁场电感耦合等离子体质谱联用测定天然水中无机硒的价态

通过对仪器参数、质谱干扰、Se同位素选择、NaBH4浓度、样品酸度、Se（Ⅵ）还原条件及氢化反应干扰的评估和优化,建立了自制连续流动氢化物发生装置与扇形磁场电感耦合等离子体质谱联用测定天然水中无机硒价态的分析方法,克服了天然水中多种元素对氢化反应的干扰,解决了不同介质样品中Se（Ⅵ）还原率保持95%以上时间短的问题。方法检出限为0.002μg/L,灵敏度为215378 cps/（μg/L）,优于同类方法,测定河水和海水中Se（Ⅵ）和Se（Ⅵ）精密度小于4%,加标回收率在97%~103%之间,可应用于准确测定海水、河口区半咸水、河水等天然水中Se（Ⅵ）和Se（Ⅵ）浓度。...

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Bibliographic Details
Published in分析化学 Vol. 42; no. 5; pp. 753 - 758
Main Author 常燕 瞿建国 张瑞峰 张经
Format Journal Article
LanguageChinese
Published 华东师范大学资源与环境学院,上海,200062%华东师范大学河口海岸学国家重点实验室,上海,200062 2014
Subjects
价态
天然水
扇形磁场电感耦合等离子体质谱
氢化物发生
硒
Hydride generation
硒
价态
氢化物发生
天然水
Inductively coupled plasma mass spectrometry
Selenium
Speciation
扇形磁场电感耦合等离子体质谱
Natural water
Online AccessGet full text
ISSN0253-3820
DOI10.3724/SP.J.1096.2014.40006

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Summary:通过对仪器参数、质谱干扰、Se同位素选择、NaBH4浓度、样品酸度、Se（Ⅵ）还原条件及氢化反应干扰的评估和优化,建立了自制连续流动氢化物发生装置与扇形磁场电感耦合等离子体质谱联用测定天然水中无机硒价态的分析方法,克服了天然水中多种元素对氢化反应的干扰,解决了不同介质样品中Se（Ⅵ）还原率保持95%以上时间短的问题。方法检出限为0.002μg/L,灵敏度为215378 cps/（μg/L）,优于同类方法,测定河水和海水中Se（Ⅵ）和Se（Ⅵ）精密度小于4%,加标回收率在97%~103%之间,可应用于准确测定海水、河口区半咸水、河水等天然水中Se（Ⅵ）和Se（Ⅵ）浓度。
Bibliography:Hydride generation;Inductively coupled plasma mass spectrometry;Natural water;Selenium;Speciation
22-1125/O6
By evaluating and optimizing instrument parameters, mass spectral interferences, selection of selenium isotopes, the concentration of NaBH4 , the acidity of samples, Se（Ⅵ） reduction conditions and the hydride generation interferences, a method was developed for measuring inorganic selenium speciation in natural water by sector field inductively coupled plasma mass spectrometry combined with laboratory made continuous-flow hydride generation, which overcame the hydride generation interference from various elements in the natural water and resolved the problem that Se（Ⅵ）reduction behavior was various in different matrix and the time of remaining stable reduction recovery was short. The detection limit was 0. 002 μg/L and the sensitivity was 215378 cps/（μg/L） which were superior to that of other similar methods. The precision of Se（Ⅵ） and Se（Ⅵ） in river water and seawater was lower than 4%, and the spiked r
ISSN:0253-3820
DOI:10.3724/SP.J.1096.2014.40006