悬浮液技术-火焰原子吸收光谱法测定银杏叶中钙铁锌  

Determination of Calcium,Iron and Zinc in a Ginkgo Leaf by Suspension Technique-Flame Atomic Absorption Spectrometry

作　　者：张起凯[1] 姚冬梅[1] 刘立行[1] 刘丙良[2] 李海彪[1] 

机构地区：[1]辽宁石油化工大学石油化工学院,抚顺113001 [2]大庆石化公司化工二厂,大庆163714

出　　处：《现代科学仪器》2005年第5期56-58,共3页Modern Scientific Instruments

摘　　要：将银杏叶样品粉碎、过筛并悬浮在1.5g/L琼脂溶液中制成悬浮液,以火焰原子吸收光谱法成功地测定了银杏叶中钙、铁、锌。用L a 3+作为钙的释放剂以消除化学干扰。试验表明,加入适量盐酸可显著提高被测元素的吸光度。对盐酸溶液(1+1)用量、试液与空白溶液粘度的一致性、背景吸收干扰、检出限及特征浓度进行了考察。测定结果的相对标准偏差小于1.8%,测定结果与灰化法一致,相对误差小于±0.9%。可见,在火焰原子吸收光谱法中,以悬浮液法取代灰化法处理银杏叶样品是可行的。方法简便准确。The sample of aginkgo leaf was crushed, sifted and then suspended in 1.5 g/L aga rsolution, and so made into suspension. Calcium, iron and zinc in a ginkgo leaf were successfully determined by flame atomic absorption spectrometry. Laa＋ was used as releasing agent for calcium to eliminate chemical interference. The results indicated that absorbances of determined element were markedly increased by adding suitable amount of hydrochloric acid into the test solution. Amount of hydrochloric acid solution （1＋1）,the identity of viscosity for test solution and its blank solution, background absorption interference, the detection limit and characteristic concentration were studied. The relative standard deviations were less than 1.8%.The determination results were consistent with those obtained by ashing method. The relative errors between them were less than ± 0.9%. In FAAS method, the displacement of ashing method by suspension technique for the sample pretreatment of aginkgo leaf is possible. This method was convenient and accurate.

关 键 词：火焰原子吸收光谱法 悬浮液技术 银杏叶 钙 铁 锌 

分 类 号：O657.31[理学—分析化学]