Determination of CN-in wastewater by high sensitive indirect spectrophotometry

Expand
  • College of Chemistry and Chemical Engineering, Hunan Univesity of Science and Technology, Xiangtan 411201, China

Received date: 2004-02-13

  Online published: 2010-10-01

Abstract

The optimum reaction conditions for decoloring effect of the blue complex formed between iodine and starch by CN- when the pH of KH2PO4-NaOH buffer solution is 7 have been studied. The maximum absorption wavelength of decoloring solution lines at 570 nm with a molor absorptivity of 3.62×104 L/(mol·cm). Beer's law holds within the range of 0-0.8 mg/L ofCN-,the detection limit is 0.02 mg/L and the recovery rate is in the range of 98.0%-103.5%. The method has been applied to the determination of micro CN- in wastewater with satisfactory results.

Cite this article

Luo Daocheng, Song Hefu . Determination of CN-in wastewater by high sensitive indirect spectrophotometry[J]. Industrial Water Treatment, 2004 , 24(12) : 50 -52 . DOI: 10.11894/1005-829x.2004.24(12).50

References

[1] 曹素忱,王载兴,叶秋云.无机化学[M].北京:高等教育出版社,1993. 372-374;
[2] 中国标准出版社二编室.水质分析力法国家标准汇编[M].北京:中国标准出版社,1996. 114-116;
[3] 汪敬武,闵敏.流动注射分光光度法测定矿物浸提液中的游离氰根[J].分析化学,1996,24(7): 798;
[4] 徐斌,徐贤英,凌连生,等.安替比林基重氮基-2, 4-二硝基苯间接分光光度法测定痕量氰化物[J].分析化学,1997, 25(4):495-497;
[5] 华中师范大学,东北师范大学,陕西师范大学.分析化学[M].北京:高等教育出版社,1981. 392-393;
[6] 华东化工学院,成都科学技术大学.分析化学[M].北京:高等教育出版社.1982. 436-438

Outlines

/