Determination of Urinary Creatinine in Washington State Residents via Liquid Chromatography/Tandem Mass Spectrometry

Table 1

Selected WEBS urine samples showing creatinine corrected results and noncorrected results for selected pyrethroid pesticide metabolites: 3-PBA (3-phenoxybenzoic acid) and trans-DCCA (trans-3-(2,2-dichlorovinyl)-2,2-dimethylcyclopropane-1-carboxylic acid); TCPy (3,5,6-trichloro-2-pyridinol); selected phthalate metabolites: MEP (mono-ethyl phthalate), MBP (mono-n-butyl phthalate), MBzP (mono-benzyl phthalate), and MEHP (mono-2-ethylhexyl phthalate); and BPA (bisphenol A).

WEBS participant urine sample	WA0217528	WA0217530	WA0217532
Creatinine (mg/L)	2288.65	2868.16	1408.12
3-PBA (g/L)	0.56	1.35	0.27
3-PBA (g/L) creatinine corrected	0.25	0.47	0.19
trans-DCCA (g/L)	0.34	1.76	0.17
trans-DCCA (g/L) creatinine corrected	0.15	0.62	0.12
TCPy (g/L)	1.10	1.78	1.55
TCPy (g/L) creatinine corrected	0.48	0.62	1.10
MEP (g/L)	419.00	611.20	21.01
MEP (g/L) creatinine corrected	183.08	213.10	14.92
MBP (g/L)	8.83	16.91	9.08
MBP (g/L) creatinine corrected	3.86	5.90	6.45
MBzP (g/L)	19.41	23.33	19.56
MBzP (g/L) creatinine corrected	8.48	8.13	13.89
MEHP (g/L)	11.64	10.47	10.01
MEHP (g/L) creatinine corrected	5.08	3.65	7.11
BPA (g/L)	0.00	2.83	0.00
BPA (g/L) creatinine corrected	0.00	0.99	0.00