Determination of Diphenyl and o-Phenylphenol in Agricultural Products by GC/MS

Abstract

A simple determination method of diphenyl (DP) and o-phenylphenol (OPP) in agricultural products by GC/MS was examined. DP and OPP were extracted with ethyl acetate in the presence of anh. sodium sulfate. After addition of n-butanol, the extract solution was concentrated. Clean-up was achieved by shaking with graphitized bulk carbon (Supelclean ENVI-Carb). Addition of polyethylene glycol sharpened the OPP peak on GC/MS analysis.The recoveries from 9 kinds of agricultural products spiked at 0.01 and 0.5 mg/g each were mostly in the range of 70 to 120̮, except for 50̮ recovery of OPP from barley spiked at 0.01 mg/ g. The quantification limits (S/N̮10) of DP and OPP were 0.0013 and 0.005 mg/g (0.0025 and 0.01 mg/g in barley and soybean), respectively.

Rapid Analysis of 2-Alkylcyclobutanones in Irradiated Meats, Cheese and Salmon by Direct Solvent Extraction Followed by GPC

“…As 2-DCB, 2-TCB and 2-HCH in the standard solution showed broad peaks on the GC-MS/MS chromatograms produced in our laboratory and no previous reports could be found on this phenomenon, we added PEG 200, which is used as an analyte protectant for pesticides analysis by GC-MS (/MS) 14), 15) . The addition of 0.1 μg/mL PEG 200 to the standard and sample solutions improved the peak sharpness and intensity for 2-DCB, 2-TCB and 2-HCH.…”