Evaluation of Parameters Influencing Hexavalent Chromium Mist Sampling: A Full Factorial Design

A chromium electroplating bath with the ability to produce homogenous mist was used to evaluate parameters influencing hexavalent chromium (Cr+6) mist sampling methods. The results of 48 Cr+6mist samples collected using the U.S. National Institute for Occupational Safety and Health method 7600showed...

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Bibliographic Details
Published inIranian journal of chemistry & chemical engineering Vol. 26; no. 4; pp. 115 - 121
Main Authors Aram Tirgar, Farideh Golbabaei, Keramat Nourijelyani, Farhang Akbar Kanzadeh, Sayed Jamaleddin Shahtaheri, Mohammad Reza Ganjali, Javad Hamedi
Format Journal Article
LanguageEnglish
Published Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR 01.12.2007
Subjects
chromium sampling method
electroplating
hexavalent chromium
mist
sampling duration
sampling head
sampling height
storage duration
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Summary:A chromium electroplating bath with the ability to produce homogenous mist was used to evaluate parameters influencing hexavalent chromium (Cr+6) mist sampling methods. The results of 48 Cr+6mist samples collected using the U.S. National Institute for Occupational Safety and Health method 7600showed that Cr+6concentration was higher: (1) For sampling by closed-face filter cassettes than for sampling by open-face filter cassettes (P <0.001); (2) for samples collected at 35 cm above the electroplating solution surface than for samples collected at 50 cm (P <0.001); (3) for sampling duration of 30 minutes than for sampling duration of 180 minutes (P <0.001); and, (4) for samples extracted immediately after sampling than for samples with delayed extraction (24 hours after sampling) (P <0.001). It is concluded that the accuracy of Cr+6 mist sampling in electroplating shops will be enhanced when: (1) closed-face filter cassette is used to prevent liquid splash contamination; (2) the recommended sampling height is 35 cm above the solution surface; (3) the sampling duration is short--approximately 30 minutes; and, (4) the extraction of the Cr+6 sample is performed as soon as the sampling is completed.
ISSN:1021-9986
1021-9986