Elemental Determination By Inductively Coupled Plasma Atomic Emission Spectrometry [chapter]

Robert Isaac, William Johnson
1997 Handbook of Reference Methods for Plant Analysis  
The main goals of this study were to determine the best preparation procedure (microwave digestion, infrared digestion, or dry ashing) to analyze 17 elements in ten tea samples from different manufacturers in China with inductively coupled plasma optical emission spectrometry. Elemental measurement accuracy was determined by comparison with certified green tea reference material (GBW10052). Our results showed that a simple, rapid, and reliable microwave digestion was the best procedure
more » ... procedure preceding spectrometric measurements, resulting in the highest mean content values of K, Ca, Mg, Fe, and Zn in the tea samples, and that Cd, Pb, and As were under permissible limits based on a national standard (NY695-2003). The elemental differences and correlation of samples, as well as the classification and differentiation between the tea samples, were analyzed statistically.
doi:10.1201/9781420049398.ch21 fatcat:u275vqcb2va6jc23vbiwxmgrxy