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| 高效液相色谱-电感耦合等离子体质谱法测定PM2.5中硒形态 |
| Determination of Selenium Species in PM2.5 by High Performance Liquid Chromatography-Inductively Coupled Plasma Mass Spectrometry |
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| DOI： |
| 中文关键词: 硒 形态分析 高效液相色谱-电感耦合等离子体质谱法 PM2.5 |
| 英文关键词: Selenium Morphological analysis HPLC-ICP/MS PM2.5 |
| 基金项目:无锡市科协软课题基金资助项目（KX-23-C134）；无锡市公共卫生中心课题基金资助项目（LCZX2021006） |
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| 中文摘要: |
| 石英空气滤膜样品以5 mmol/L柠檬酸为提取剂，75℃水浴超声浸提3 h，浸提液用高效液相色谱-电感耦合等离子体质谱法（HPLC-ICP/MS）测定硒酸根［Se（Ⅵ）］、亚硒酸根［Se（Ⅳ）］、硒脲（SeUr）、硒代蛋氨酸（SeMet）等4种硒形态。结果表明，方法在0μg/L～50.0μg/L范围内线性良好，上述4种硒形态方法检出限分别为0.25μg/L、0.58μg/L、1.17μg/L、0.25μg/L。空白滤膜加标样11次测定结果的RSD为1.1%～4.9%，平均加标回收率为70.0%～103%。将该方法用于分析无锡地区PM2.5中的硒，发现主要是无机硒形态，未检出有机硒形态。 |
| 英文摘要: |
| The samples collected by quartz filter membrane were extracted by ultrasound in 75 ℃ water bath for 3 h, using 5 mmol/L citric acid as the extraction agent. Selenate ［Ⅵ］, selenite ［Ⅳ］, selenourea (SeUr) and selenomethionine (SeMet) in the extraction solution were determined by high performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP/MS). The results showed that the method had good linearity in the range of 0μg/L to 50.0μg/L, and the method detection limits for the above four selenium species were 0.25μg/L, 0.58μg/L, 1.17μg/L and 0.25μg/L, respectively. The RSD of 11 measurements of spiked blank filter membrane samples ranged from 1.1% to 4.9%, and the average recoveries ranged from 70.0% to 103%. The method was applied in analyzing selenium in PM2.5 in Wuxi area, inorganic selenium was found to be dominant, but organic selenium was not detected. |
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