title: Determination of lead in soybean sauces by the diffusive gradients in thin films technique.
abstract: A diffusive gradients in thin films (DGT) device with sodium poly (aspartic acid) (PASP) as a novel binding agent (PASP DGT) combined with graphite furnace atomic absorption spectrometry (GFAAS) was developed for the sampling and measurement of lead in soybean sauce samples. The performance of PASP DGT was independent of pH in the range of 3-6 and salinity in the range from 4 to 14 g/L (as NaCl). There was no significant difference between PASP DGT technique and hydride generation atomic fluorescence spectrometry (HG-AFS) method for the measurement of lead in soybean sauce samples. The recoveries of lead in spiked soybean sauce samples determined by PASP DGT coupled with GFAAS were 94.3-97.2% with the relative standard deviations of 2.52-3.09%. The concentrations of Pb in twelve soybean sauce samples determined by PASP DGT coupled with GFAAS were in the range of 0.09-0.71 mg/L.
authors.affiliation: College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Research Institute of Food Science, Bohai University, Food Safety Key Lab of Liaoning Province, Jinzhou 121013, China. Electronic address: redastar@163.com.
authors.forename: Hong
authors.initials: H
authors.lastname: Chen
authors.affiliation: College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Research Institute of Food Science, Bohai University, Food Safety Key Lab of Liaoning Province, Jinzhou 121013, China.
authors.forename: Lianwen
authors.initials: L
authors.lastname: Guo
authors.affiliation: College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Research Institute of Food Science, Bohai University, Food Safety Key Lab of Liaoning Province, Jinzhou 121013, China.
authors.forename: Menghan
authors.initials: M
authors.lastname: Zhang
authors.affiliation: College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Research Institute of Food Science, Bohai University, Food Safety Key Lab of Liaoning Province, Jinzhou 121013, China.
authors.forename: Jiali
authors.initials: J
authors.lastname: Gu
authors.affiliation: College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Research Institute of Food Science, Bohai University, Food Safety Key Lab of Liaoning Province, Jinzhou 121013, China.
authors.forename: Keli
authors.initials: K
authors.lastname: Zhong
authors.affiliation: College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Research Institute of Food Science, Bohai University, Food Safety Key Lab of Liaoning Province, Jinzhou 121013, China.
authors.forename: Le
authors.initials: L
authors.lastname: Bo
authors.affiliation: College of Chemistry, Chemical Engineering and Food Safety, Bohai University, Research Institute of Food Science, Bohai University, Food Safety Key Lab of Liaoning Province, Jinzhou 121013, China. Electronic address: lijianrong@zjgsu.edu.cn.
authors.forename: Jianrong
authors.initials: J
authors.lastname: Li
mesh_terms: D004058:Diffusion; D004784:Environmental Monitoring / Q000379:methods*; D007854:Lead / Q000633:toxicity*; D013025:Glycine max / Q000009:adverse effects* / Q000737:chemistry
chemical_list: D007854:Lead
keywords: Diffusive gradients in thin films; Lead; Preconcentration; Sodium poly (aspartic acid); Soybean sauce