Catalytic Photometric Determination of Trace Hg in Environmental Water and Sewage Sludge SamplesReport as inadecuate




Catalytic Photometric Determination of Trace Hg in Environmental Water and Sewage Sludge Samples - Download this document for free, or read online. Document in PDF available to download.

Mercury is recognized as one of the most toxic elements, so the environmental water and sewage sludge samples must be determined accurately. In diluted hydrochloric acid medium, trace Hg Ⅱ plays a significant catalytic role in hydrochloric nile blue HNB oxidized by potassium bromate reaction in presence of nitrilotriacetic acid. This paper hereby investigates the catalytic fading reaction of trace Hg Ⅱ to hydrochloric nile blue HNB oxidized by potassium bromate, a new method for the determination of trace Hg Ⅱ by catalytic kinetic spectrophotometry is established. The results show that the maximum absorption wavelength of the colored solution is 610nm, the detection limit is 4.5 × 10-9g-mL, catalytic extent and Hg Ⅱ have a good linearity relationship in the 0 to 0.10 mg - L range. The method is used for the determination of trace mercury in water and sewage samples with satisfactory results.

KEYWORDS

Mercury, Catalytic Spectrophotometry, Water Sample, Sewage Sludge Sample, Monitoring

Cite this paper







Author: Baoqing Xiao

Source: http://www.scirp.org/



DOWNLOAD PDF




Related documents