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Table 2 Preliminary examination of blood lead (BPb) levels in one subject

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

  Lead (μg/dL)a
Blood samples transferred to the laboratory directly
 BPb levels by different blood collection methods
  Measurement vial blood collection from the right earlobe 0.84
  Capillary blood collection from the right earlobe 0.87
  Capillary blood collection from the left earlobe 0.91
  Vacuum tube blood collection from the median cubital vein 0.83
 BPb levels analyzed after storing blood obtained from the median cubital vein in capillary tubesb
  1-day storage 0.84
  2-day storage 0.84
  3-day storage 0.85
  5-day storage 0.84
BPb levels in blood samples transferred to the laboratory via a courier delivery at 4 °C. 0.89
  1. aAverage value of two measurements for lead levels in blood collected in a measurement vial, capillary tube or vacuum tube
  2. bCapillary tube samples were stored at 4 °C until analysis