Spectrophotometric determination of trace amounts of mercury(II) in waste with p-azobenzenediazoaminoazobenzene sulfonic acid

Journal Article · Sun Sep 01 04:00:00 EDT 1996 · Analytical Letters

DOI:https://doi.org/10.1080/00032719608002243· OSTI ID:441451

Wanquan, Jiang; Yurui, Zhu; Gu, Jin; Guohua, Wu ^[1]

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1. Univ. of Science and Technology of China, HefeiAnhui (China)

A new method for the direct determination of trace mercury in aqueous solution with high selectivity and sensitivity is reported. In the presence of Triton X-100 and NH{sub 3}NH{sub 4}Cl medium, a new chromogenic reagent p-azobenzenediazoaminoazobenzene sulfonic acid (ADAAS) forms a red complex with mercury(II). The molar absorptivity is 1.76x10{sup 5} 1 {center_dot} mol{sup -1} cm{sup -1} at 528 nm. Beer`s law is obeyed in the range of 6.0x10{sup -8} -6.0x10{sup -6} mol/L for Hg(II). Only cadmium interferes in the determination of mercury, and it can be eliminated by masking with nitrilotriacetic acid. The proposed method has been successfully used for the determination of trace amounts of mercury in waste water.

• Sponsoring Organization: USDOE
• OSTI ID: 441451
• Journal Information: Analytical Letters, Journal Name: Analytical Letters Journal Issue: 12 Vol. 29; ISSN ANALBP; ISSN 0003-2719
• Country of Publication: United States
• Language: English

Related Subjects

40 CHEMISTRY
54 ENVIRONMENTAL SCIENCES
AQUEOUS SOLUTIONS
CHEMICAL ANALYSIS
INTERFERING ELEMENTS
MERCURY
SPECTROPHOTOMETRY
WASTE WATER