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利用石墨炉原子吸收光谱法(AAS)研究了定量分析锡时氯化物产生的干扰,而且还利用X射线光电子分光法(XPS)研究了这种干扰的机理。业已查明,在有金属氯化物共存时氯化物对Sn有负干扰,而且这种氯化物的干扰可通过加入铵盐来有效地加以抑制。根据XPS的测定结果,当金属氯化物在试料基体中共存时,在600℃温度下氯化物也会在石墨炉中残存下来,但若加入硝酸铵,则氯化物离子在200℃温度下会消失。根据这个结果考察了这种氯化物的干扰,又研究了通过加入铵盐抑制干扰的机理。
Graphite furnace atomic absorption spectroscopy (AAS) was used to study the interference caused by chloride during the quantitative analysis of tin. The mechanism of this interference was also studied by X-ray photoelectron spectroscopy (XPS). Chloride has been found to have negative interference with Sn in the presence of metal chlorides and this chloride interference can be effectively suppressed by the addition of ammonium salts. According to the XPS measurement results, when the metal chloride coexists in the sample matrix, the chloride remains in the graphite furnace at a temperature of 600 ° C. However, when ammonium nitrate is added, chloride ions at 200 ° C disappear. Based on this result, the interference of this chloride was examined, and the mechanism of suppressing the interference by adding ammonium salt was also studied.