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Zhao H.,National Marine Food Quality Supervision and Testing Center | Wang X.,National Marine Food Quality Supervision and Testing Center | Wang X.,Zhejiang Ocean University | Wang P,National Marine Food Quality Supervision and Testing Center | And 3 more authors.
Chinese Journal of Chromatography (Se Pu) | Year: 2013

An analytical method was developed for the determination of the extraetiohof volatile iV-nitrosamine compounds including N-nitrosodimethylamine (NDMA), N-nitrosodiethyl-amine (NDEA), N-nitrosodipropylamine (NDPA), N-nitrosodibutylamine (NDBA), N-nitros-opiperidine (NPIP), and N-nitrosopyrrolidine (NPYE) from salted aquatic products by gas chromatography-mass spectrometry (GC-MS). In thisexperiment, the separation and detection conditions were optimized for different extraction methods, solid-phase extraction columns, and chromatographic columns. The results showed that the linear correlation coefficients (R2 were higher than 0. 999 8 within 10-1 000μg/L. and the reproducibilities were good with the relative standard deviations (RSD) less than 8%. The recoveries were 79%-105%. It is noted that this method for the determination of volatile N-nitrosamine compounds in salted aquatic products was much mor, sensitivity and with a lower detection limits (0. 05 μg/kg except NDPA) than the previously reported methods. This proposed method is rapid and convenient for the determination, and easy for the operation. It is appropriate for the determination of volatile AT-nitroBamine compounds in various salted aquatic products. Source


Wang P.-Y.,National Marine Food Quality Supervision and Testing Center | Zhou Y.,National Marine Food Quality Supervision and Testing Center | Huang L.,National Marine Food Quality Supervision and Testing Center | Zhao H.,National Marine Food Quality Supervision and Testing Center | And 4 more authors.
Jiliang Xuebao/Acta Metrologica Sinica | Year: 2012

A methd is developed for determination of ampicillin and amoxicillin residues in aquatic product using reversed-phase high performance liquid chromatography-fluorescence detection with pre-column derivatization. The sample extracts are cleaned up by solid-phase extraction cartridge and then derivatized with derivative agent. The results show that the calibration graphs is linear in the concentration rang of 0.001~0.1 mg/kg (r=0.9999). The detection limit and quantification limit are 0.001 mg/kg (S/N=3) and 0.003 mg/kg (S/N=10) for ampicillin, 0.005 mg/kg (S/N=3) and 0.015 mg/kg (S/N=10) for amoxicillin. The average recoveries are between 76.3%~96.8% with relative standard deviations (RSDs) of 0.63%~6.71% (re=6). The method is simple, rapid, sensitive and reproducible, it can be used for the routine analysis of the ampicillin and amoxicillin residues in aquatic product. Source


Zhao H.,National Marine Food Quality Supervision and Testing Center | Wang X.,National Marine Food Quality Supervision and Testing Center | Wang P.,National Marine Food Quality Supervision and Testing Center | Zhou Y.,National Marine Food Quality Supervision and Testing Center | And 2 more authors.
Se pu = Chinese journal of chromatography / Zhongguo hua xue hui | Year: 2013

An analytical method was developed for the determination of the extraction of volatile N-nitrosamine compounds including N-nitrosodimethylamine ( NDMA) , N-nitrosodiethylamine (NDEA), N-nitrosodipropylamine (NDPA), N-nitrosodibutylamine (NDBA), N-nitrosopiperidine (NPIP), and N-nitrosopyrrolidine (NPYR) from salted aquatic products by gas chromatography-mass spectrometry (GC-MS). In this experiment, the separation and detection conditions were optimized for different extraction methods, solid-phase extraction columns, and chromatographic columns. The results showed that the linear correlation coefficients (R2) were higher than 0. 999 8 within 10 - 1 000 micro g/L, and the reproducibilities were good with the - relative standard deviations (RSD) less than 8%. The recoveries were 79% - 105%. It is noted that this method for the determination of volatile N-nitrosamine compounds in salted aquatic products was much more sensitivity and with a lower detection limits (0. 05 micro g/kg except NDPA) than the previously reported methods. This proposed method is rapid and convenient for the determination, and easy for the operation. It is appropriate for the determination of volatile N-nitrosamine compounds in various salted aquatic products. Source

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