摘要
用密闭高温高压消解-电感耦合等离子体原子发射光谱(ICP-AES)法测定白茶中铝、镉、钴、铬、铜、镁、锰、镍、铅、锡、锶、钙12种元素,对用三种混合酸消解液在高压密闭罐中消解样品进行了实验,确定王水对样品的前处理效果最好。各元素标准曲线的线性回归方程相关系数均大于0.999;检出限在0.0001~0.025mg/L之间,相对标准偏差(RSD)<4.5%,回收率为91.9%~106%。该方法操作简便,用酸量少降低对环境的危害,精密度高、检测结果可靠。
Aluminum,cadmium,cobalt,chromium,copper,magnesium,manganese,nickel,lead,tin,strontium,and calcium in white tea were determined using a closed high-temperature and high-pressure digestion inductively coupled plasma atomic emission spectroscopy(ICP-AES)method.Experiments were conducted on the digestion of samples using three mixed acid digestion solutions in a high-pressure sealed tank,and it was determined that aqua regia had the best pre-treat-ment effect on the samples.The correlation coefficients of the linear regression equations of the calibration curves for each element are all greater than 0.999;The detection limit is between 0.0001 and 0.025 mg/L,the relative standard deviation(RSD)is less than 4.5%,and the recovery rate is 91.9 to 106%.This method is easy to operate,uses less acid to reduce en-vironmental hazards,has high precision,and reliable detection results.
作者
陈冰
Chen Bing(Fujian Testing Technology Research Institute,Fuzhou,Fujian 350003,China)
出处
《福建分析测试》
CAS
2024年第4期26-31,共6页
Fujian Analysis & Testing
基金
福建省属公益类科研院所专项(2022R1006003)。
关键词
密闭高温高压
ICP-AES
白茶
enclosed high temperature and high pressure
ICP-AES
White tea
