کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5134178 | 1492073 | 2017 | 6 صفحه PDF | دانلود رایگان |
A method for the determination of cadmium in herb samples based on solidified floating organic drop microextraction (SFODME) using 1-(2-Pyridylazo)-2-naphthol (PAN) as a chelating reagent and detection by electrothermal atomic absorption spectrometry (ETAAS) was developed in the present work. The effects of pH, extraction solvent, extraction time, stirring rate, and extraction temperature were investigated. Under the optimized conditions, the calibration graph was linear in the range of 0.017-3.0 μg Lâ1, with a detection limit (LOD) of 0.0052 μg Lâ1. The relative standard deviation (%RSD) for 6 replicate measurements of 1.0 μg Lâ1 cadmium was ±2.67%. The method was applied to the analysis of 10 types of Thai herb samples. Percentage recoveries were in the range 94.5-110.2%. It was found that cadmium concentrations in all Thai herb samples were less than the maximum residue level.
Journal: Food Chemistry - Volume 219, 15 March 2017, Pages 453-458