DPD光度法与便携仪器法测定游离氯的比较研究 |
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引用本文: | 王舒婷,田渭花,蔺凯,杏艳,窦蓓蕾.DPD光度法与便携仪器法测定游离氯的比较研究[J].安徽农学通报,2014(17):26-28. |
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作者姓名: | 王舒婷 田渭花 蔺凯 杏艳 窦蓓蕾 |
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作者单位: | 陕西省环境监测中心站;西安市水环境监测中心; |
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摘 要: | 目的:比较DPD光度法和便携仪器法测定游离氯的特点,以便合理选择和应用。结果:DPD光度法和便携式仪器法精密度均较好,DPD光度法线性一般,重复性较差。实际样品测定表明:便携式仪器法测得低浓度水样RSD为18.8%,高浓度RSD为4.7%;DPD光度法测得低浓度水样RSD为2.4%,高浓度水样RSD为3.9%。结论:便携式仪器法快速、简便的特点适合在现场进行测定,DPD光度法操作繁琐,但测定低浓度水样时比便携式仪器法准确度高。
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关 键 词: | DPD光度法 便携仪器法 游离氯 |
Comparison of DPD Spectrophotometry and Portable Detector for Testing Residual Chlorine |
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Institution: | Wang Shuting et al. (1Environmental Monitoring Center Station of Shaanxi Province,Xi'an 710054,China) |
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Abstract: | Objective:To compare two methods for testing residual chlorine in water for reasonable selection and application.Results:Both of the two methods had good precisions.The linear of DPD Spectrophotometry was general.And this method had bad repetition.Determination of the samples showed that in method porta-ble detector,low concentration RSD was 18.8%,high concentration RSD was 4.7%;in method DPD Spectro-photometry,low concentration RSD was 2.4%,high concentration RSD was 3.9%.Conclusion:Method portable detector is more advantageous and easier to use on field.Though method DPD Spectrophotometry had the complex operation,it was more accurately than method portable detector for low concentration detection. |
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Keywords: | DPD spectrophotometry Portable detector Free chlorine |
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