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Efficacy of a Lead Based Paint XRF Analyzer and a Commercially Available Colorimetric Lead Test Kit as Qualitative Field Tools for Determining Presence of Lead in Religious Powders

Efficacy of a Lead Based Paint XRF Analyzer and a Commercially Available Colorimetric Lead Test Kit as Qualitative Field Tools for Determining Presence of Lead in Religious Powders

Manthan P Shah, Derek G Shendell, Qingyu Meng, Pamela Ohman-Strickland, William Halperin

J Occup Environ Hyg. 2018 Jul;15(7):541-548.

PMID: 29683773

Abstract:

The performances of a portable X-Ray Fluorescence (XRF) lead paint analyzer (RMD LPA-1, Protec Instrument Corp., Waltham, MA) and a commercially available colorimetric lead test kit (First Alert Lead Test Kit, eAccess Solutions, Inc., Palatine, IL) were evaluated for use by local or state health departments as potential cost-effective rapid analysis or "spot test" field techniques for tentative identification of lead content in sindoor powders. For both field-sampling methods, sensitivity, specificity and predictive values varied widely for samples containing <300,000 µg/g lead. For samples containing ≥300,000 µg/g lead, the aforementioned metrics were 100% (however, the CIs had a wide range). In addition, both field sampling methods showed clear, consistent positive readings only for samples containing ≥300,000 µg/g lead. Even samples with lead content as high as 5,110 µg/g were not positively identified by either field analysis technique. The results of this study suggest the XRF analyzer and colorimetric lead test kit cannot be used as a rapid field test for sindoor by health department inspectors.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AS2121229	Lead in Powdered Paint			Price

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