Recommendation from the Scientific Committee on Occupational ...

Appendix
Table 1
August 2010
European Commission
Employment, Social Affairs and Inclusion
<strong>Recommendation</strong> <strong>from</strong> <strong>the</strong> <strong>Scientific</strong> <strong>Committee</strong> on Occupational Exposure Limits for aniline
The two OSHA methods, OSHA method PV 2118 and a modified version of <strong>the</strong> OSHA
method PV 2118, gave virtually similar results and results were not significantly influenced
by humidity or temperature (McKernan et al. 2008). Thus, results <strong>from</strong> <strong>the</strong> NIOSH (limit of
detection: 0.6 µg/sample and limit of quantitation: 2 µg/sample (Pendergrass 2004)) and
<strong>the</strong> modified OSHA method are tabulated below. The OSHA method has a higher
detection limit than <strong>the</strong> NIOSH method (http://www.osha.gov/dsg/guidance/101707diacetyl-meeting-notes.html,
accessed 12, December 2008). In consequence,
comparisons were not included where <strong>the</strong> NIOSH method detected diacetyl, but no
diacetyl was detected in <strong>the</strong> modified OSHA method (Table I: [NIOSH (+);OSHA (0)]/N
samples= 4/24 and Table II: [NIOSH (+);OSHA (0)]/N samples= 3/30 (McKernan et al. 2008));
this would presumably have a limited influence on <strong>the</strong> comparison between <strong>the</strong> two
methods due to <strong>the</strong> limited number of data points excluded. The ratio between a result
<strong>from</strong> <strong>the</strong> OSHA and <strong>the</strong> NIOSH method (B/A) cannot be calculated where <strong>the</strong> OSHA
method detects diacetyl, but <strong>the</strong> NIOSH method detects no diacetyl (Table I: [NIOSH
(0);OSHA (+)]/N samples= 3/24 and Table II: [NIOSH (+);OSHA (0)]/N samples = 14/30
(McKernan et al. 2008)) as such a ratio will be infinite. Thus, <strong>the</strong>se values have to be
excluded <strong>from</strong> <strong>the</strong> calculations; Table I allowed <strong>the</strong> use of 15/24 and Table II <strong>the</strong> use of
5/30 data pairs (cf. McKernan et al. 2008). This lends a limited credit to a ratio calculated
<strong>from</strong> <strong>the</strong> values of <strong>the</strong> remaining data pairs, which are listed below.
Table
McKernan et al. 2008
NIOSH
(ppm) (A)
OSHA modified
(ppm) (B)
B/A
I 0.04 0.11 2.75
I 0.02 0.04 2.00
I 0.07 0.08 1.14
I 0.04 0.12 3.00
I 0.1 0.15 1.50
I 0.01 0.04 4.00
I 0.42 0.54 1.29
I 0.08 0.16 2.00
I 0.02 0.16 8.00
I 0.17 0.35 2.06
I 0.02 0.07 3.50
I 0.39 0.48 1.23
I 1.05 1 0.95
I 0.05 0.37 7.40
I 0.02 0.04 2.00
II 0.05 0.63 12.60
II 0.57 1.58 2.77
II 0.08 0.14 1.75
II 0.53 6.33 11.94
II 0.03 0.03 1.00
Mean (range): 3.64
(0.95-12.60)
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