Aziz-Alrahman A M
Int J Environ Anal Chem. 1985;22(3-4):251-7. doi: 10.1080/03067318508076424.
An atomic absorption spectrophotometric method is described for determining trace amounts of copper in tea. The method is based on the solvent extraction of the metal as tetraiodocuprate (I), from 2 M HCl solutions of tea samples which contain 12% (w/v) KI, into methylisobutyl ketone. The organic extracts, containing the ion-association complex of copper are atomized into an air-acetylene flame. The limit of detection is 1.14 micrograms g-1 Cu.
描述了一种用于测定茶叶中痕量铜的原子吸收分光光度法。该方法基于将金属以四碘合铜（I）的形式从含有12%（w/v）碘化钾的茶叶样品的2M盐酸溶液中溶剂萃取到甲基异丁基酮中。含有铜离子缔合络合物的有机萃取物被雾化到空气 - 乙炔火焰中。检测限为1.14微克 g-1铜。
