A methodological consideration for blood lead concentrations obtained from the earlobe in Japanese adults occupationally unexposed to lead

Table 1 Lead levels in solutions recovered from capillary tubes: analysis of lead contamination

	Lead levels (μg/dL)
Heparinized glass capillary tube	Physiological saline solution	1/100-diluted HNO₃
TERUMO Corp. (150 μL, cap, VC-C110HL)	0.429	0.801
Thermo Fisher Scientific Inc. (250 μL, KN3131665)	0.119	0.136
Siemens Healthcare Diagnostics Manufacturing Ltd. (175 μL, cap, J473763)	0.015	0.019

ISSN: 1347-4715