S-Benzylmercapturic acid and S-phenylmercapturic acid in urine: METHOD 8326, Issue 1, dated 20 May 2014 - Page 10 of 10
Table 4. INDIVIDUAL SMOKER and NON-SMOKER RECOVERY EXPERIMENT of BMA and PMA Background Level Individual Sample
Fortified Urine (background + 6 ng/mL)
Fortified Urine Recovery
BMA (ng/ mL)
PMA (ng/ mL)
BMA (ng/ mL)
PMA (ng/mL) BMA [ng/mL (percent)]
PMA [ng/mL (percent)]
Smoker 1
2.7
0.2
8.7
6.2
8.6 (99%)
6.5 (104%)
Smoker 2
28.3
0.3
34.3
6.3
34.7 (101%)
6.9 (108%)
Smoker 3
15.9
0.9
21.9
6.9
21.3 (97%)
7.9 (114%)
Smoker 4
5.7
0.3
11.7
6.3
11.6 (99%)
7.7 (121%)
Smoker 5
1.3
nd
7.3
6.0
6.9 ( 95%)
6.4 (106%)
Smoker 6
9.2
0.7
15.2
6.7
15.5 (102%)
7.0 (104%)
Mean
10.5
0.4
16.5
6.4
16.4 (99%)
7.1 (110%)
Non-smoker 1 0.3
nd
6.3
6.0
6.2 ( 98%)
6.2 (103%)
Non-smoker 2 7.1
nd
13.1
6.0
14.3 (109%)
7.4 (123%)
Non-smoker 3 6.8
nd
12.8
6.0
13.1 (102%)
6.8 (112%)
Non-smoker 4 23.3
nd
29.3
6.0
28.6 ( 97%)
6.3 (105%)
Non-smoker 5 4.7
nd
10.7
6.0
11.0 (103%)
6.3 (105%)
Non-smoker 6 7.2
nd
13.2
6.0
13.5 (102%)
6.1 (101%)
Mean
-
14.2
6.0
14.5 (102%)
6.5 (108%)
Notes:
8.2
The instrumental limit of detection (LOD) was estimated to be approximately 0.2 ng/mL for both analytes. The lowest standard value was 0.5 ng/mL for both analytes. [Values near the LOD were reported to one significant figure.] nd = none detected (< 0.2 ng/mL)
NIOSH Manual of Analytical Methods (NMAM), Fifth Edition
