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| 固相萃取-气相色谱法测定饮用水中甲基汞 |
| Determ ination ofM ethylmercuryin DrinkingW ater by Gas Chromatography with Solid Phase Extraction |
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| 摘要点击次数: 1249 |
| 全文下载次数: 1922 |
| 中文摘要: |
| 根据巯基棉在一定酸性条件下能定量吸附甲基汞的原理, 利用多通道并联的固相萃取装置 , 采用气相色谱(ECD)方法测定饮用水中痕量甲基汞, 考察了水样pH值对回收率的影响。方法在 0.050 mg/L~ 1. 00 m g/L 范围内线性良好, 当采样体积为1.0 L时, 检出限为0.03 ng/L, 标准样品与实际水样平行测定的相对标准偏差均 < 5.0%, 加标回收率均> 80% 。建议采用全程序空白、溶剂空白、平行样品、加标回收率和实验室质控样等质量控制手段来保证分析数据的准确性。 |
| 英文摘要: |
| Adsorbed by sulfhydrylcotton in acidicsolution, methylmercury in drinking waterwasdeter mined bygaschromatograph withECD. Thesolidphaseextractionwasperformedbyusing amulti channelparal leling device andinfluenceofpH valueinwatersamplesonrecovery wasobserved. Itwasfoundthatgoodlinear ity ofmethod obtainedin rangefrom 0.050mg/L to1.00 mg/L, detection limits0.03 ng/L atsamplevolume 1.0 L, RSD ofstandard and parallelsamples< 5.0% , spikedrecoveries> 80%. Somesuggestionsweremade foraccuratedataby using QA /QC oflaboratoryincludingblankthrough entireprocedurealongwithsamples, so lution blank, parallelsamples, andspiked recoveries. |
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