Food Inspection & Quarantine Center

Shenzhen, China

Food Inspection & Quarantine Center

Shenzhen, China
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Xiao F.,Food Inspection & Quarantine Center | Xiao F.,Shenzhen Academy of Inspection and Quarantine | Bian X.-H.,Food Inspection & Quarantine Center | Bian X.-H.,Shenzhen Academy of Inspection and Quarantine | And 8 more authors.
Journal of Chinese Mass Spectrometry Society | Year: 2016

A method of high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS) was developed for the simultaneous determination of 16 perfluoroalkylated substances (PFASs) in oral liquid products. The residual of perfluoroalkylated substances in samples were extracted using methanol acidified with 2% hydrochloric acid solution as the extraction solvent, then enriched by N-propylethylenediamine (PSA) and PestiCarb (GCB) absorbent after adjusting extract's pH to neutral. Next, the compounds were eluted with 50 mmol/L triethylamine-methanol solution. At last, the exact was analyzed by HPLC-MS/MS in negative mode with multiple reaction monitoring (MRM). All the analyte were calibrated by the internal method. Good linearities were established for the 16 perfluoroalkylated substances in the range from 0.2 g/L to 20 g/L. For all of 16 perfluoroalkylated substances, the limit of detection is less than 0.15 g/L, while the limit of quantitation is less than 0.43 g/L. The average recoveries of 16 perfluoroalkylated substances are between 80.8% and 119% in the spiking levels of 0.5, 1.0, 2.0 and 5.0 g/L. The relative standard deviation (RSD) of 16 perfluoroalkylated substances is less than 10.5%. The method is simple, rapid and sensitive, which suits for determination of 16 perfluoroalkylated substances in oral liquid samples. © 2016, Editorial Board of Journal of Chinese Mass Spectrometry Society. All right reserved.


He P.-F.,Shenzhen University | Zhang H.,Shenzhen University | Li J.,Shenzhen University | He L.,Shenzhen Environmental Monitoring Center | And 5 more authors.
Huanjing Kexue/Environmental Science | Year: 2016

In order to explore the residual characteristics of perfluorinated compounds (PFCs) in the atmosphere of Shenzhen, passive air samplers consisting of polyurethane foam (PUF) disks impregnated with XAD-4 power were deployed at 12 sites in Shenzhen from November 2014 to February 2015. Seven volatile and fifteen ionic PFCs were analyzed. The results indicated that ∑PFCs concentration ranged from 23.7 pg·m-3 to 157 pg·m-3 (mean: 79.0 pg·m-3), dominated by volatile PFCs, with 8:2 FTOH, 6:2 FTOH, PFPeA, PFOA being the dominant compounds. The spatial distribution of volatile and ionic PFCs concentrations was the same, displaying the characteristic of "the northwest being higher than the southeast". Furthermore, the concentrations of 6:2 FTOHs, 8:2 FTOHs, PFPeA, PFHxA and PFOA had positive correlations with PM2.5 and PM10 (P<0.05, P<0.01) and were more positively correlated with the levels of PM10 than those of PM2.5. © 2016, Science Press. All right reserved.

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