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本文研究了环境、地质及生物样品中镓、铟、铊的测定条件,试验了各种金属盐类、有机化合物及各种金属碳化物涂层石墨管对测定镓、铟、铊的基体改进作用,确定了每一个待测元素的最佳基体改进剂体系。实验表明:镍的存在可使镓的允许灰化温度由900℃增至1200℃,灵敏度提高6倍。钯能使水溶液中的铟的允许灰化温度由800℃增至1200℃,灵敏度增加3倍多,并能使有机萃取液中的铟的允许灰化温度由小于400℃
In this paper, the determination conditions of gallium, indium and thallium in environmental, geological and biological samples were studied, and the effects of various metal salts, organic compounds and various metal carbide coated graphite tubes on the determination of gallium, indium and thallium matrix were tested , Identified the best matrix modifier system for each element under test. The experimental results show that the presence of nickel can increase the allowable ashing temperature of gallium from 900 ℃ to 1200 ℃ and increase the sensitivity six times. Palladium can increase the allowable ashing temperature of indium in aqueous solution from 800 ℃ to 1200 ℃, more than three times the sensitivity, and allow the allowable ashing temperature of indium in the organic extract from less than 400 ℃