电感耦合等离子体原子发射光谱法测定齿科修复用烤瓷钯银合金中的钌

Determination of ruthenium in porcelain-palladium-silver alloys for dental restorations by inductively coupled plasma atomic emission spectrometry

用盐酸和硝酸的混合酸于180℃下加压消解钯银基合金样品6 h,待样品溶解完全,在20%的盐酸和3.5%的硝酸酸度下,采用电感耦合等离子体原子发射光谱法(ICP-AES法)测定烤瓷修复用钯银合金中的钌.结果表明,钯银基体及共存离子不干扰钌的测定,方法简单、准确度高,相对标准偏差为1.0%,回收率为99.8%.

A mixed acid of hydrochloric acid and nitric acid was used to digest the palladium-silver-based alloy sample under pressure at 180℃for 6 h.After the sample was completely dissolved,inductively coupled plasma atomic emission spectrometry was used at 20%hydrochloric acid and 3.5%nitric acid(ICP-AES method).Determination of ruthenium in palladium-silver alloy for porcelain restoration.The results shows that the palladium-silver substrate and coexisting ions do not interfere with the determination of ruthenium.This method is simple and accurate.The relative standard deviation(RSD)is 1.0%,and the recovery ratio is 99.8%.