关于铬酸雾测定问题的探讨

随着人们对铬酸雾环境问题的日益重视,铬酸雾的测定工作就显得愈发重要.文中总结了铬酸雾标准限值,阐述国内外测定方法标准及进展,最后结合实际工作指出测定中的注意事项及存在问题.研究表明,目前国内有关铬酸雾测定的标准方法仅有《固定污染源排气中铬酸雾的测定二苯基碳酰二肼分光光度法》（HJ/T29-1999）,国内外有关铬酸雾的其它测定方法也鲜有报道.在依照国标方法测定铬酸雾的实际工作中,测定结果的准确度受诸多因素影响,主要为试剂质量、玻璃器皿的清洗、显色酸度、显色温度、空气采样器流量等,需要引起注意.目前铬酸雾测定也存在诸多问题需要改进及解决,如干扰消除问题、采样管路材质问题、吸收提取液问题、质保质控问题、新测定方法拓展问题等.

Discussion on Determination of Chromate Fog

With the people＇ s recognition on chromate fog, the determination of chromate fog is coming more important. This paper summarizes the limits of chromate fog, then recounts the determination standards inside and outside our country and progresses, at last points out the attentions and problems of the determination combining with the actual jobs. Research shows that the current domestic relevant standard method for the determination of chromium mist is only the stationary sources on the determination of chromium acid mist method （ HJ/T29 - 1999 ） , about the chromic acid mist and few reports of other measuring method. In accordance with national standard method for determination of chromium acid mist in the actual work, the accuracy of determination results are influenced by many factors, mainly for the quality of reagent, glassware cleaning, acidity of color, color temperature, air sampler flow, etc. , need to attract attention. The determination of chromium acid mist also has many problems to be improved and solved, such as interference elimination, sampling tube material problems, absorption extract, quality assurance, quality control problems, a new measurement method development problems.