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Hamner用无火焰原子吸收法测定金属铬中银、铋、砷、锑、硒和碲时,用硝酸镍作基体改进剂,以避免被测元素在灰化阶段损失。本文在选定的条件下,考察了阳极泥试样中几种主要成分对碲的干扰,选用硝酸镍作基体改进剂,消除了4000倍量铅和1000倍量锡的干扰。试样分解后用标准加入法测定。仪器及工作条件使用配有HGA-400型石墨炉、AS-40型自动进样器和056型记录仪及PRS-10型打印机的P-E703型原子吸收分光光度计;标准石墨管和碲无极放电灯。波长214.3nm;灯用功率9瓦;分光带宽0.2nm;灰化温度1000℃,时间20秒;原子化温度2700℃.时间5秒;净化温度2700℃,时间3秒。干扰试验考察常见阳极泥试样中三种主成份铜、铅和锡对碲的影响表明,4000倍铜不影响碲的测
Hamner Nickel nitrate as a matrix modifier in the determination of silver, bismuth, arsenic, antimony, selenium and tellurium in chromium metal by flameless atomic absorption spectrometry in order to avoid the loss of the measured element in the ashing stage. In this paper, under the selected conditions, the interference of several main components in the anode mud sample on tellurium was investigated. Using nickel nitrate as the matrix modifier, the interference of 4000 times of lead and 1000 times of tin was eliminated. After the sample is decomposed by standard addition method. Apparatus and Working Conditions P-E703 atomic absorption spectrophotometer with a HGA-400 graphite furnace, an AS-40 autosampler and a Model 056 recorder and a PRS-10 printer was used; a standard graphite tube and a tellurium electrode Discharge lamp. Wavelength 214.3nm; lamp power 9 watts; spectral bandwidth 0.2nm; ashing temperature 1000 ℃, time 20 seconds; atomization temperature 2700 ℃. Time 5 seconds; purification temperature 2700 ℃, time 3 seconds. Interference test to examine the common anode mud samples of the three main components of copper, lead and tin on tellurium shows that 4000 times the copper does not affect the measurement of tellurium