化学试剂络合对改性活性炭吸附痕量铂、钯的影响  

Chemical Reagents Complexation to the Effect on Trace Amounts of Platinum and Palladium Adsorption for Modified Activated Carbon

作　　者：郎春燕[1] 林龙飞[1] 魏建军[1] 徐进勇[2] 张路[2] 夏祥[1] 吴晓蓉[1] 周莉[1] 

机构地区：[1]成都理工大学材料与化学化工学院,四川成都610059 [2]成都理工大学核技术与自动化工程学院,四川成都610059

出　　处：《化学试剂》2014年第3期248-250,共3页Chemical Reagents

摘　　要：为了更准确地测定土壤中的铂、钯，在体积分数为5％的盐酸介质中，选用不同试剂为络合剂，改性活性炭为吸附剂，电感耦合等离子体质谱法测定土壤中的铂、钯。实验研究表明：经盐酸羟胺改性的活性炭富集，铂、钯的回收率为92．3％-102．4％；8-羟基喹啉为络合剂时，铂的回收率为86．4％-104．9％，钯的回收率为91．7％-100．0％；抗坏血酸为络合剂时，铂的回收率为82．6％-100．9％，钯的回收率为86．2％～98．3％；硫脲为络合剂时，铂的回收率为78．2％-105．1％，钯的回收率为81．9％-95．3％。方法检出限：铂为0．017ng／mL，钯为0．021ng／mL。该方法操作简便，分析速度快，灵敏度高，具有良好的测定精密度和准确度，适用于超痕量铂、钯的分析。To obtain a more accurate determination of plati- num and palladium in the soil,in 5% hydrochloric acid medi- um,selection of different reagents as complexing agent, modi- fied activated carbon as an adsorbent, determinated by ICP- MS. The results showed that ：The activated carbon by hydrox- ylamine hydrochloride enrichment, Pt, Pd recovery is 92.3% -102.4% ;8-hydroxyquinoline as complexing agent, Pt recovery is 86.4% - 104.9% ,Pd recovery is 91.9% 100. 0% ;ascorbie acid as complexing agent, Pt recovery is 82. 5% - 100. 9% ,Pd recovery is 86.2% -98.3% ;Thioure- a as complexing agent, Pt recovery is 78.2% -105.1% ,Pd recovery is 81.7% - 95.3% ; The detection limit of Pt, Pd was 0. 017 ng/mL and 0. 021 ng/g. The proposed method proved to be simple, rapid and sensitive with good measure- ment precision,suitable for ultra-trace analysis of Pt,Pd.

关 键 词：活性炭 ICP-MS 8-羟基喹啉 硫脲 抗坏血酸 回收率 

分 类 号：O657.63[理学—分析化学]