| 亚硝酸盐氮对硫化物测定的干扰及消除 |
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| 引用本文： | 曾志果,康媞,林铁. 亚硝酸盐氮对硫化物测定的干扰及消除[J]. 贵州师范大学学报(自然科学版), 2009, 27(2) |
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| 作者姓名： | 曾志果 康媞 林铁 |
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| 作者单位： | 贵州师范大学,地理与环境科学学院,贵州,贵阳,550001;贵州省环境科学研究设计院,贵州,贵阳,550002;贵州省环境科学研究设计院,贵州,贵阳,550002 |
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| 摘 要： | 对氨基二甲基苯胺光度法和碘量法测定硫化物过程中,高浓度的亚硝酸盐氮(NO2--N)会对分析测定产生明显干扰,在CNO2--N=150mg/L左右、S2-加标量为100mg/L时,两种测定方法的加标回收率分别为68.27%和58.21%。实验证明,在用碘量法测定硫化物时,若将无CO2水重复冲洗滤纸3次,其加标回收率可达103.84%。
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| 关 键 词： | 硫化物测 亚硝酸盐氮 干扰 加标回收率 |
Interference and avoidance of nitrite in the determination of sulfides |
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| ZENG Zhi-guo,KANG Ti,LIN Tie. Interference and avoidance of nitrite in the determination of sulfides[J]. Journal of Guizhou Normal University(Natural Sciences), 2009, 27(2) |
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| Authors: | ZENG Zhi-guo KANG Ti LIN Tie |
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| Affiliation: | 1.School of Geography and Environment Sciences;Guizhou Normal University;Guiyang;Guizhou;550001;China;2.Guizhou Research and Design Institute of Environmental Sciences;Guizhou 550002;China |
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| Abstract: | In the process of determination of sulfides with methylene blue spectrophotometric method and iodometric method,the determination of sulfides was seriously interfered by nitrite with a high concentration about 150mg/L.Recovery rates of the two methods are 68.27% and 58.21%.The experiment proved that if filter paper was washed three times repeatedly when we used the iodometric method,the recovery rate could be up to 103.84%. |
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| Keywords: | determination of sulfides nitrite interference recovery rate |
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