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Li F.,Shandong Center for Food Safety Risk Assessment | Jiang D.,Shandong Center for Food Safety Risk Assessment | Jiang D.,Shandong University | Zheng F.,Shandong Center for Food Safety Risk Assessment | And 2 more authors.
Food Additives and Contaminants: Part B Surveillance | Year: 2015

In this study a total of 522 samples were collected from Shandong province of China in 2014 and analysed for the occurrence of fumonisin B1 (FB1), FB2 and FB3 by isotope dilution ultrahigh performance liquid chromatography–tandem mass spectrometry. Fumonisins were detected in 98.1% of the corn products, with the average total level of 369.2 μg kg−1. The individual average values of FB1, FB2 and FB3 in corn products were 268.3, 53.7 and 47.2 μg kg−1, respectively. The simultaneous occurrence of FB1, FB2 and FB3 was observed in 76.7% of the corn products. Especially, the results demonstrated that the difference in the contamination levels for fumonisins in these three types of corn products was apparent. In addition, 6.2% of the wheat flour samples were contaminated with FB1, with concentrations ranging from 0.3 to 34.6 µg kg−1. No FB2 or FB3 was detected in wheat flour. In corn oil samples no fumonisins were detected. © 2015 Taylor & Francis. Source


Yang L.,Shandong Center for Food Safety Risk Assessment | Yang L.,Shandong University | Wang X.,Shandong Center for Food Safety Risk Assessment | Wang X.,Shandong University | And 7 more authors.
Marine Pollution Bulletin | Year: 2016

The total concentrations of rare earth elements (σREE) were quantified in 251 samples from 10 common species of freshwater and marine fish in seventeen cities of Shandong, China. σREE obtained from the freshwater fish ranged from 34.0 to 37.9 ngg-1 (wet weight) and marine fish from 12.7 to 37.6 ngg-1. The ratio of LREE to HREE was 13.7:1 and 10:1 for freshwater and marine fish, respectively. This suggests that freshwater fish exhibit greater REE concentrations than marine fish and the biological effects of LREE are higher than HREE. Results revealed a similar REE distribution pattern between those fish and coastal sediments, abiding the "abundance law". The health risk assessment demonstrated the EDIs of REEs in fish were significantly lower than the ADI, indicating that the consumption of these fish presents little risk to human health. © 2016 Elsevier Ltd. Source


Jiao Y.,Shandong Center for Food Safety Risk Assessment | Li F.,Shandong Center for Food Safety Risk Assessment | Jiang D.,Shandong Center for Food Safety Risk Assessment | Li W.,Shandong Center for Food Safety Risk Assessment | Chen J.,Shandong Center for Food Safety Risk Assessment
Analytical Letters | Year: 2016

Isomaltooligosaccharides are widely used in food with health benefits. A sensitive and selective method for the determination of three isomaltooligosaccharides is reported using ultra-high performance liquid chromatography–tandem mass spectrometry. The method was validated by characterization of the linearity, accuracy, precision, and the limits of detection and quantification. Under the optimized conditions, the calibration relationships were linear for the analytes with correlation coefficients exceeding 0.998. The recoveries were from 91.5% to 107.6% with coefficients of variation below 9.0%. The limits of detection and quantification were 1.20 µg mL−1 and 3.60 µg mL−1 for isomaltose, 0.15 µg mL−1 and 0.50 µg mL−1 for panose, and 0.55 µg mL−1 and 1.80 µg mL−1 for isomaltotriose. The validated method was employed for the determination of isomaltooligosaccharides in milk powder. © 2016, Copyright © Taylor & Francis Group, LLC. Source


Jiang D.,Shandong Center for Food Safety Risk Assessment | Jiang D.,Shandong University | Xin C.,Shandong Center for Food Safety Risk Assessment | Xin C.,Shandong University | And 12 more authors.
Food and Chemical Toxicology | Year: 2015

This work studies on the quantitative analysis and health risk assessment of polycyclic aromatic hydrocarbons (PAHs) in edible vegetable oils in Shandong, China. The concentrations of 15 PAHs in 242 samples were determined by high performance liquid chromatography coupled with fluorescence detection. The results indicated that the mean concentration of 15 PAHs in oil samples was 54.37 μg kg-1. Low molecular weight PAH compounds were the predominant contamination. Especially, the carcinogenic benzo(a)pyrene (BaP) was detected at a mean concentration of 1.28 μg kg-1, which was lower than the limit of European Union and China. A preliminary evaluation of human health risk assessment for PAHs was accomplished using BaP toxic equivalency factors and the incremental lifetime cancer risk (ILCR). The ILCR values for children, adolescents, adults, and seniors were all larger than 1 × 10-6, indicating a high potential carcinogenic risk on the dietary exposed populations. © 2015 Elsevier Ltd. Source

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