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. Author manuscript; available in PMC: 2011 Oct 1.
Published in final edited form as: J Chromatogr B Analyt Technol Biomed Life Sci. 2010 Feb 1;878(27):2635–2642. doi: 10.1016/j.jchromb.2010.01.012

Table 3.

Summary of the average inhalation and total dermal HDI levels and HDA and acetylated HDA concentrations in the end-of-day urine samples collected from three workers occupationally exposed to HDI using different treatment conditions.

Worker Breathing-zone HDI1 (μg/m3) Dermal HDI2 (ng/mm3) HDA (μg/l) Monoacetyl-HDA (μg/l) Diacetyl-HDA (μg/l)
Acid3 Base None Base None Base None
1 0.94 15.8 4.1 ND ND 1.7 0.020 ND 0.048
2 15.0 730 10.1 0.026 ND 2.2 0.061 0.065 0.060
3 4.3 20.3 0.36 ND ND 0.19 ND ND 0.015

ND = non-detectable.

1

Average HDI breathing-zone level across paint tasks (μg/m3) determined using LC-MS.

2

Total dermal HDI exposure level across paint tasks (ng/mm3) determined using LC-MS.

3

Urinary HDA concentration determined using acid hydrolysis and GC-MS [4].