微波消解-ICP-AES法测定欧盟REACH高度关注物质

Determination of Substances of Very High Concern in REACH by Microwave Digestion-ICP-AES

采用浓HNO3–H2O2溶液微波法消解样品,电感耦合等离子体原子发射光谱(ICP–AES)测定欧盟REACH高度关注物质样品中Sn,As,Pb,Co,Cr元素的含量。样品中Sn,As,Pb,Co,Cr元素的含量在0.01～10 mg/L范围内与发射强度呈线性关系,线性相关系数大于0.9999,各元素的回收率在94.9%～104.8%之间,样品测定结果的相对标准偏差小于5%(n=10)。Sn,As,Pb,Co,Cr元素的检出限分别为0.004,0.004,0.005,0.002,0.002 mg/L。该方法测定结果准确可靠,适用于欧盟REACH高关注物质的快速初筛。

Tin, arsenic, lead, cobalt and chromium in REACH substances of very high concern（SVHC） were analyzed by microwave digestion-ICP-AES with HNO3-H202. The content of Sn, As, Pb, Co, Cr had good relationship with its emission intensity in the range of 0.01-10 mg/L, linear correlation coefficients were more than 0.999 9. The recoveries of Sn, As, Pb, Co and Cr were 94.9%-104.8%. The RSDs of determination results were all less than 5%（n=10）. The detection limits of Sn, As, Pb, Co, Cr were 0.004,0.004,0.005,0.002,0.002 mg/L, respectively. This method was accurate and could be used in fast screening of SVHC in REACH.