可溶滤膜富集-石墨炉原子吸收法测定钯  

Determination of palladium by graphite furnace atomic absorption spectrophotometry after preconcentration on a soluble membrane filter

作　　者：陈明星[1] 邹洪[1] 

机构地区：[1]首都师范大学化学系,北京100037

出　　处：《现代仪器》2005年第6期11-13,共3页Modern Instruments

摘　　要：本文提出一种基于将钯(Ⅱ)与1-亚硝基-2-萘酚-3,6-二磺酸钠形成阴离子螯合物,再与十四烷基苄基胺阳离子表面活性剂缔合,此离子缔合物放收集在o.3μm硝酸纤维素膜上,用小体积的浓硫酸溶解滤膜和缔合物后于石墨炉原子吸收法测定ng/L级钯的新方法.在2.0～108ng钯/5mL范围内线性良好,富集倍数超过40倍,在10倍预富集时,检测限为12ng/L,常见离子不干扰,用于富集和测定来源不同的河水和海水中钯(Ⅱ),加标回收率90.6%～100.4%.A new method for the preconcentration and determination ng/L of Palladium, based on the reaction between palladium （Ⅱ） and Nitroso R salt （Dipotassium-l-nitro-so-2naph-thol-3, 6-sulphonate, NRS） to form anionic chelate and the collection of the ternary ion-associate of the chelate with tetradecyldimethylbenzylammonium chloride （Zeph） on a soluble membrane filter has been described. The ternary complex, collected on 0.3tan nitrocellulose filter is dissolved with the filter in a small volume of concentrated sulphuric acid and the Palladium is determined by GFAAS under the opti- mizied conditions. Good linearity is observed over the range 0.6 - 108ng Palladium （ Ⅱ ） in 5mi of solvent with good reproducibility. Detection limit better than 12ng/L of palladium can be achieved with a 10-fold enrichment factor. Enrichment factor is better than 40. No interference from ions normally present in water was observed The proposed method has been applied lo the concentration and determination of palladium（ Ⅱ ） in water samples from two sources and the recoveries of add Palladium（n） were 90.6% - 100.4%.

关 键 词：钯(Ⅱ) 微孔滤膜富集 石墨炉原子吸收法 

分 类 号：X832[环境科学与工程—环境工程] O614.823[理学—无机化学]