悬浮液进样-石墨炉原子吸收光谱法测定竹叶中铜和铅的溶出率  

GFAAS Determination of Copper and Lead Released from Bamboo Leaves with Suspension-Sample Introduction

作　　者：张换平[1] 杜慧[1] 邓俊俊 王书红[1] 田大勇[1] 

机构地区：[1]安阳工学院化学与环境工程学院,安阳455000

出　　处：《理化检验（化学分册）》2018年第1期73-76,共4页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

基　　金：国家自然科学基金(U1404217);安阳工学院科研基金项目(YJJ2014004)

摘　　要：竹叶10.000 0 g置于500 mL烧杯中,加水400 mL,煎煮约30 min后,过滤后浓缩至约200 mL,离心30 min后,上层清液即为竹叶水煎液;竹叶粉末(过0.075 mm筛孔)0.018 0 g,加0.15%(质量分数)琼脂溶液3.5 mL和硝酸(2+98)溶液1 mL置于10 mL比色管中,用水定容,超声15 min,制得竹叶悬浮液。采用石墨炉原子吸收光谱法分别测定竹叶悬浮液、竹叶水煎液中的铜和铅含量,进而计算出竹叶中铜和铅的溶出率。结果表明,铜和铅的溶出率分别为7.37%,13.34%,测定值的相对标准偏差(n=6)均小于5%。The sample of bamboo leaves （10, 000 0 g） was placed into a 500 mL beaker and 400 mL of water was added, and the mixture was boiled for about 30 rain, filtered and concentrated to 200 mL. After centrifugation for 30 min, the supernatant was taken as the water decoction of bambos leaves. The powder of bamboo leaves （0. 018 0 g; passing through sieve with bore diameter of 0. 075mm）, 3. 5 mL of 0. 15; （w） agar solution and 1 mL of HNO3 （2＋98） solution were placed into a 10 mL colorimetric tube and then made its volume up to 10 mL with water. The mixture was treated ultrasonically for 15 min to obtain a suspension of bamboo leaves. Copper and lead in the water decoction and the suspension of bamboo leaves were determined separately by graphite furnace atomic absorption spectrometry （GFAAS）. The rate of dissolution of copper and lead from bamboo leaves were calculated. It was found that the dissolution rates of copper and lead were 7. 37%, 13.34%, respectively. Vakles of RSDs （n=6） found were all less than 5;.

关 键 词：石墨炉原子吸收光谱法 悬浮进样 铜 铅 竹叶 溶出率 

分 类 号：O657.31[理学—分析化学]