GF-AAS光谱分析锗的热稳定性及抗干扰能力  

STUDY ON THE THERMOSTABILITY AND THE INTERFERECE-RESISTING PROPERTY OF GERMANIUM IN GF AAS

作　　者：冯素萍[1] 陈荣礼[1] 曾利容[2] 周波 

机构地区：[1]山东大学实验中心 [2]山东大学化学院 [3]济南出口商品检验局

出　　处：《山东大学学报（自然科学版）》1999年第2期202-207,共6页Journal of Shandong University(Natural Science Edition)

摘　　要：ＧＦＡＡＳ法测试生物样品中微量锗的主要干扰因素及其消除方法．采用了Ｐｄ（ＮＯ３）２和ＬｉＮＯ３复合基体改进剂加Ｂａ（ＮＯ３）２辅助基体改进剂，锗的热稳定性及体系的抗干扰能力远高于采用单一基体改进剂．灰化温度达１６００℃，未见锗产生挥发损失．试样中ＮａＣｌ量达６．０ｇ／Ｌ，Ｎａ２ＳＯ４量高达６００ｍｇ／Ｌ也未干扰锗的测定．本法用于实际样品分析效果良好．用Ｘ射线衍射光谱法确证了Ｐｄ（ＮＯ３）２存在下锗在石墨管内加热至≥１２００℃的灰化产物为锗钯金属化合物．Various matrix interferences on the determination of trace germanium in biological samples were studied dy GF-AAS.The thermostability and the interference-resisting property of germanium were increased remaredly when palladium and lithium nitrates were used as complexing matrix modifiers and barium nitrate as a supplementary matrix modifier.There were no losses of evaporated germanium when ashing temperature increased to 1 600 ℃,and there were no interferences to the determination of germanium even when the coexistent content of sodium chloride was up to 6.0 g/L,the content of sodium sulfate was up to 600 mg/L in the samples. The X-ray diffraction analysis affirmed that the ashing product was germanium-palladium intermetallic compounds when germanium and palladium nitrates were heated simultaniously up to 1 200 ℃ in the graphite furnace.

关 键 词：锗 GF-AAS光谱分析 热稳定性 抗干扰能力 

分 类 号：O614.431[理学—无机化学]