重铬酸盐浓度对低浓度水样中化学需氧量测定的影响

doi:10.3976/j.issn.1002-4026.2013.01.020

J4 ›› 2013, Vol. 26 ›› Issue (1): 97-101.doi: 10.3976/j.issn.1002-4026.2013.01.020

重铬酸盐浓度对低浓度水样中化学需氧量测定的影响

韩术鑫，王利红，薛富民，马虹，高平

1.山东省分析测试中心，山东济南 250014； 2. 山东省地质环境监测总站，山东济南 250014

收稿日期:2012-05-07 出版日期:2013-02-20 发布日期:2013-02-20
作者简介:韩术鑫（1984-），男，工学硕士，研究方向为水质监测和水资源评价。Email:hsxaa369@yahoo.com.cn
基金资助:
山东省分析测试中心科技发展基金

Impact of dichromate concentration on the determination of CODCr in low concentration water

HAN Shu-Xin, WANG Li-Hong, XUE Fu-Min, MA Hong, GAO Ping

1.Shandong Analysis and Test Center, Jinan 250014,China； 2. Shandong Geological Environmental Monitoring Station, Jinan 250014,China

Received:2012-05-07 Online:2013-02-20 Published:2013-02-20

摘要/Abstract

摘要：

针对GB 11914对低浓度水样测定化学需氧量（CODCr）准确度差的问题，采用不同浓度的重铬酸盐法对山东省内不同地区的低浓度水样进行测定比较，以此分析浓度梯度对CODCr的影响程度。结果表明，CODCr随着重铬酸盐浓度的增加而增大。空白水的质量、滴定终点的判定等对测定结果产生重要影响。建议分析低浓度水样的CODCr时全面收集水样的相关信息，并充分权衡方法的系统误差、氧化能力和检测范围，采用适宜浓度的重铬酸盐法，以提高检测数据的准确度。

关键词: 重铬酸盐浓度, 低浓度水样, 化学需氧量

Abstract:

We employed different concentrations of dichromate to determine low concentration water from different areas of Shandong Province for the bad precision of the determination of CODCr with low concentration water by GB 11914. This is to analyze the impact of concentration gradient on CODCr. Results indicate that CODCr increases with the increase of dichromate concentration. Determination result is significantly affected by quality of blank water, determination of endpoints, etc. We should completely collect the relative information about water samples when analyzing low concentration water. We should also fully consider system errors, oxidizability and detection range and choose suitable dichromate concentration in order to improve the accuracy of data detection.

Key words: dichromate concentration, low-concentration water, CODCr

中图分类号:

X832

韩术鑫，王利红，薛富民，马虹，高平. 重铬酸盐浓度对低浓度水样中化学需氧量测定的影响[J]. J4, 2013, 26(1): 97-101.

HAN Shu-Xin, WANG Li-Hong, XUE Fu-Min, MA Hong, GAO Ping. Impact of dichromate concentration on the determination of CODCr in low concentration water[J]. J4, 2013, 26(1): 97-101.

重铬酸盐浓度对低浓度水样中化学需氧量测定的影响

Impact of dichromate concentration on the determination of CODCr in low concentration water

PDF (PC)

赞

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 1

Metrics

本文评价

推荐阅读 0