Biomonitoring

The ACGIH (2000) recommends several biological exposure indices to monitor exposure to 1,1,1-TCE (see Table 22.1).

Table 22.1 Biological exposure indices for 1,1,1-trichloroethane (ACGIH, 2000)

Determinant

Sampling time

BEI

1,1,1-TCE in end-exhaled air

Prior to last shift of work week

40 ppm

Trichloroethanol in urine

End of work week

30 mg/l

Trichloroacetic acid in urine

End of shift at end of work week

10 mg/l

Trichloroethanol in blood

End of shift at end of work week

1 mg/l

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