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ＧＦＡＡＳ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．
Main interference factors of GFASA method for measuring trace germanium in biological samples and its elimination method. Adopting Pd (NO3) 2 and LiNO3 composite matrix modifier and Ba (NO3) 2 assistant matrix modifier, the thermal stability of germanium and anti-interference ability of the system are much higher than that of single matrix modifier. Ashing temperature of 1600 ℃, no loss of germanium generated volatility. Sample NaCl content of 6.0g / L, Na2SO4 up to 600mg / L did not interfere with the determination of germanium. This method is used for actual sample analysis. It was confirmed by X-ray diffractometry that the ashing product of germanium heated to ≧ 1200 ° C in the graphite tube in the presence of Pd (NO3) 2 was germanium-palladium metal compound.