Two-step coprecipitation method for differentiating chromium species in water followed by determination of chromium by neutron activation analysis

Chi Ren Lan; Chia Liang Tseng; Mo Hsiung Yang; Zeer B. Alfassi

doi:10.1039/AN9911600035

Two-step coprecipitation method for differentiating chromium species in water followed by determination of chromium by neutron activation analysis

Chi Ren Lan, Chia Liang Tseng, Mo Hsiung Yang, Zeer B. Alfassi

Unit of Nuclear Engineering

Research output: Contribution to journal › Article › peer-review

64 Scopus citations

Abstract

A two-step method for the determination of Cr^VI and Cr ^III in natural waters was developed. The method is based on the variation of the coprecipitation yields with Pb(PDC)₂ (PDC = pyrrolidine dithiocarbamate) as a function of pH. By using two different pH values both species can be determined separately. Firstly, Cr^VI was coprecipitated at pH 4.0 and then Cr^III was separated at pH 9. Total chromium was determined by reduction of Cr^VI followed by coprecipitation at pH 9. The validity of the procedure was checked with the National Institute of Standards and Technology Standard Reference Material 1643b Trace Elements in Water and the result was found to be in good agreement with the certified value.

Original language	English
Pages (from-to)	35-38
Number of pages	4
Journal	The Analyst
Volume	116
Issue number	1
DOIs	https://doi.org/10.1039/AN9911600035
State	Published - 1 Dec 1991

ASJC Scopus subject areas

Analytical Chemistry
Biochemistry
Environmental Chemistry
Spectroscopy
Electrochemistry

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abstract = "A two-step method for the determination of CrVI and Cr III in natural waters was developed. The method is based on the variation of the coprecipitation yields with Pb(PDC)2 (PDC = pyrrolidine dithiocarbamate) as a function of pH. By using two different pH values both species can be determined separately. Firstly, CrVI was coprecipitated at pH 4.0 and then CrIII was separated at pH 9. Total chromium was determined by reduction of CrVI followed by coprecipitation at pH 9. The validity of the procedure was checked with the National Institute of Standards and Technology Standard Reference Material 1643b Trace Elements in Water and the result was found to be in good agreement with the certified value.",

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AU - Lan, Chi Ren

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AU - Yang, Mo Hsiung

AU - Alfassi, Zeer B.

PY - 1991/12/1

Y1 - 1991/12/1

N2 - A two-step method for the determination of CrVI and Cr III in natural waters was developed. The method is based on the variation of the coprecipitation yields with Pb(PDC)2 (PDC = pyrrolidine dithiocarbamate) as a function of pH. By using two different pH values both species can be determined separately. Firstly, CrVI was coprecipitated at pH 4.0 and then CrIII was separated at pH 9. Total chromium was determined by reduction of CrVI followed by coprecipitation at pH 9. The validity of the procedure was checked with the National Institute of Standards and Technology Standard Reference Material 1643b Trace Elements in Water and the result was found to be in good agreement with the certified value.

AB - A two-step method for the determination of CrVI and Cr III in natural waters was developed. The method is based on the variation of the coprecipitation yields with Pb(PDC)2 (PDC = pyrrolidine dithiocarbamate) as a function of pH. By using two different pH values both species can be determined separately. Firstly, CrVI was coprecipitated at pH 4.0 and then CrIII was separated at pH 9. Total chromium was determined by reduction of CrVI followed by coprecipitation at pH 9. The validity of the procedure was checked with the National Institute of Standards and Technology Standard Reference Material 1643b Trace Elements in Water and the result was found to be in good agreement with the certified value.

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Two-step coprecipitation method for differentiating chromium species in water followed by determination of chromium by neutron activation analysis

Abstract

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