Simultaneous Determination of 12 Elements in White Tea by Closed High Temperature and High Pressure Digestion ICP-AES
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 0.000 1 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.
enclosed high temperature and high pressureICP-AESWhite tea
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