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COMPREHENSIVE EVALUATION OF A FIELD TEST KIT FOR LEAD
Citation:
George, G., M. Schock, AND K. Kelty. COMPREHENSIVE EVALUATION OF A FIELD TEST KIT FOR LEAD. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-92/096 (NTIS PB92179720), 1991.
Description:
The Hach Lead-Trak(R) test kit for lead in water was tested in a laboratory evaluation. onsidered were: perator bias, precision, accuracy, linear calibration range, and potential drinking water interferences. nterferences tested were realistic levels off: a, Mg, Ni, Sb, Mn, Cd, Cu, Zn, Fe(II), Fe(III), A1, N03, C11, F, PO43, P2074, P6O18-6, and P3010 5 . nterferences were tested individually in deionized water, using a linear regression slope technique to detect bias. esults of analyses of split spiked samples and actual drinking water samples were compared to GFAAS values. greement with GFAAS was generally good from 0 to 50 ug Pb/L, but the kit suffered from significant negative interferences from Fe(II), Zn(II), and all polyphosphates. ecoveries of Pb from 6 different tap waters ranged from 81 to 109%. o operator bias was found.
