Analytical methods for phenyltin compounds in polychlorinated biphenyl-based transformer oil samples.
We present the first study on the analytical methods of phenyltin compounds (PTs) in polychlorinated biphenyl (PCB)-based transformer oil samples. Tetraphenyltin (TePhT) has been used as stabilizer for some kinds of PCBs-based transformer oil formulations. Monophenyltin (MPhT), diphenyltin (DPhT) and triphenyltin (TrPhT) could have been formed from TePhT during long-term use. TePhT was directly measured by gas chromatograph (GC) connected with three types of detectors, a mass spectrometer (MS), a flame photometric detector (FPD) and an atomic emission detector (AED) after dilution with hexane. MPhT, DPhT and TrPhT were propylated with Grignard reagent before measurement. The MS was the most sensitive of the detectors, with detection limits of phenyltin compounds of 30 ng/ml (MPhT), 9.8 ng/ml (DPhT), 5.5 ng/ml (TrPhT) and 0.60 ng/ml (TePhT), respectively. From the viewpoint of selectivity, MS was slightly worse than other detectors, but interference from PCBs matrices was not significant under ordinary analytical conditions. Two used transformer oil samples were analyzed using the analytical methods developed in this study. TePhT and TrPhT were found in both samples.
Research Center for Material Cycles and Waste Management, National Institute for Environmental Studies, 16-2 Onogawa, Tsukuba, Ibaraki 305-8506, Japan. tyama@nies.go.jp
Takashi
T
Yamamoto
Yukio
Y
Noma
Akio
A
Yasuhara
Shin-ichi
S
Sakai
D002849:Chromatography, Gas / Q000379:methods*; D007202:Indicators and Reagents; D013058:Mass Spectrometry / Q000379:methods*; D009821:Oils / Q000737:chemistry*; D009947:Organotin Compounds / Q000032:analysis*; D011078:Polychlorinated Biphenyls / Q000737:chemistry*; D012680:Sensitivity and Specificity
D007202:Indicators and Reagents; D009821:Oils; D009947:Organotin Compounds; C063613:phenyltin; D011078:Polychlorinated Biphenyls