地表水中pH、DO、硝酸盐氮、挥发性卤代烃等项目最长保存期限研究
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摘要
依据水样中pH、溶解氧、硝酸盐氮、亚硝酸盐氮、挥发性卤代烃测试标准和水质保存技术规范,设计合理的时间梯度,比较样品随着保存时间变化各指标检测结果的变化,在保证检测结果准确可靠的前提下确定最长保存期限。地表水样品pH值结果在采样结束后冷藏保存48 h内无明显变化,DO在采样结束后加入固定剂冷藏保存24 h内无明显变化,地表水样品硝酸盐氮、亚硝酸盐氮、氯化溶剂检测结果在采样结束后加入固定剂冷藏保存72 h内无明显变化。
According to the pH, DO, NO~-_3-N, NO~-_2-N, volatile halogenated hydrocarbons testing standards and technical specifications for water saving, this study designs the reasonable time gradient, compared the results changes as time changes. On the premise of guarantee the accuracy and reliability of the test results, it tries to achieve the longest shelf life. Surface water samples pH test results at the end of the sampling within 48 h of cold storage has no obvious change. DO test results at the end of the sampling within 24 h of cold storage have no obvious change. NO~-_3-N, NO~-_2-N and volatile halogenated hydrocarbons test results at the end of the sampling within 72 h of cold storage all have no obvious change.
According to the pH, DO, NO~-_3-N, NO~-_2-N, volatile halogenated hydrocarbons testing standards and technical specifications for water saving, this study designs the reasonable time gradient, compared the results changes as time changes. On the premise of guarantee the accuracy and reliability of the test results, it tries to achieve the longest shelf life. Surface water samples pH test results at the end of the sampling within 48 h of cold storage has no obvious change. DO test results at the end of the sampling within 24 h of cold storage have no obvious change. NO~-_3-N, NO~-_2-N and volatile halogenated hydrocarbons test results at the end of the sampling within 72 h of cold storage all have no obvious change.
引文
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[2]马占青,江平.水及废水监测[M].浙江:浙江大学出版社,2015.
[3]喻金钱.三种水体中溶解氧的检测方法介绍[J].当代水产,2017(2):78-79.
[4]陆虎,王莹.离子色谱法测定水中的亚硝酸盐氮[J].供水技术,2015,9(3):53-54.
[5]张红,王毓,彭佩岚等.分光光度法测定水质亚硝酸盐氮含量不确定度的评定[J].农家科技旬刊,2017(6).
[6]安代志,史云,王莉莉,等.水中三氯甲烷和四氯化碳检测二次曲线回归的研究[J].理化检验-化学分册,2016,52(1):77-79.
[7]环境保护部.HJ 493水质采样样品的保存和管理技术规定[S],2009.
[8]环境保护部.HJ/T 84水质无机阴离子的测定离子色谱法[S],2016.
[9]谭凯.基于吹扫捕集与气质联用探究—饮用水中三氯甲烷与四氯化碳的检测[J],2016(6):267.