Rapid determination of total mercury in treated waste water by cold vapor atomic absorption spectrometry in alkaline medium with sodium hypochlorite solution

Shigehiro Kagaya*, Yoshiharu Kuroda, Yuka Serikawa, Kiyoshi Hasegawa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

Addition of a sodium hypochlorite solution (9.2% (w/v)) was effective to reduce a sulfide interference in determination of organic mercury, including methylmercury and phenylmercury, as well as a previously reported determination of inorganic mercury by cold vapor atomic absorption spectrometry (CVAAS) in an alkaline medium. Total mercury ranging from 0.17 to 33 μg L-1 in 15 mL of sample solutions containing up to 200 mg L-1 of sulfide can be determined without any serious interference by sulfide when 1 mL of the sodium hypochlorite solution was added after dilution of the sample solution to 25 mL. The proposed method was simple and rapid because no digestion processes were required for the determination of total mercury; the time required for the determination was only about 5 min. The proposed method was applicable to the analysis of treated waste water.

Original languageEnglish
Pages (from-to)554-557
Number of pages4
JournalTalanta
Volume64
Issue number2
DOIs
StatePublished - 2004/10/08

Keywords

  • Alkaline medium
  • Cold vapor atomic absorption spectrometry
  • Sodium hypochlorite solution
  • Sulfide interference
  • Total Hg

ASJC Scopus subject areas

  • Analytical Chemistry

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