Determination of Lead Content in Zanthoxylum bungeanum by Wet Digestion-Graphite Furnace Atomic Absorption Spectroscopy
Zanthoxylum bungeanum is a commonly used seasoning on dining tables in regions such as Yunnan,Guizhou,Sichuan,and Chongqing.The content of heavy metals in Zanthoxylum bungeanum directly affects people's physical health,and its quality and safety inspec-tion and monitoring are particularly important.This article uses wet digestion-graphite furnace atomic absorption spectroscopy to determine the Pb content in Zanthoxylum bungeanum.Under optimal instrument conditions,25 Zanthoxylum bungeanum samples from different regions in Si-chuan Provice were measured,with a linear range of 0.00-200.00 ng/mL and a detection limit of 0.005 mg/L.The precision of the method is good,with a relative range of 9.93％;The method is accurate,and the relative error of the quality control sample determination results is-7.50％--16.25％.The Pb content of Zanthoxylum bungeanum samples from 25 different regions has not exceeded the limit standard for pol-lutants in food specified in GB 2762-2022.
万方数据
维普
