冶金分析
冶金分析
야금분석
METALLURGICAL ANALYSIS
2010年
3期
45-49
,共5页
韦小玲%潘雪珍%韦湫阳%龚琦%朱薇
韋小玲%潘雪珍%韋湫暘%龔琦%硃薇
위소령%반설진%위추양%공기%주미
铟%还原%共沉淀%分离富集%预处理%原子吸收光谱法
銦%還原%共沉澱%分離富集%預處理%原子吸收光譜法
인%환원%공침정%분리부집%예처리%원자흡수광보법
indium%reduction%coprecipitation%separation and enrichment%pre-treatment%atomic ab-sorption spectrometry
针对锌焙砂酸浸液中高浓度Fe~(3+)和Zn~(2+)对微量In~(3+)的光谱测定存在严重的基体干扰,提出一种铟与锌、铁粗分离,并使铟得以富集的还原-共沉淀前处理方法.用Na_2 SO_3溶液将锌焙砂酸浸液中大量Fe~(3+)还原成Fe~(2+),调节溶液pH值为4.0~4.5,溶液中少量未被还原的Fe~(3+)形成Fe(OH)_3沉淀,In~(3+)也以In(OH)_3形式共沉淀而得到富集,大量Zn~(2+)和Fe~(2+)则留在溶液中.富集铟的滤泥用酸溶解,以原子吸收光谱法测定铟.该方法对铟富集率达到98%以上,锌和铁的去除率分别达到90 %以上,基本满足铟光谱测定的要求.
針對鋅焙砂痠浸液中高濃度Fe~(3+)和Zn~(2+)對微量In~(3+)的光譜測定存在嚴重的基體榦擾,提齣一種銦與鋅、鐵粗分離,併使銦得以富集的還原-共沉澱前處理方法.用Na_2 SO_3溶液將鋅焙砂痠浸液中大量Fe~(3+)還原成Fe~(2+),調節溶液pH值為4.0~4.5,溶液中少量未被還原的Fe~(3+)形成Fe(OH)_3沉澱,In~(3+)也以In(OH)_3形式共沉澱而得到富集,大量Zn~(2+)和Fe~(2+)則留在溶液中.富集銦的濾泥用痠溶解,以原子吸收光譜法測定銦.該方法對銦富集率達到98%以上,鋅和鐵的去除率分彆達到90 %以上,基本滿足銦光譜測定的要求.
침대자배사산침액중고농도Fe~(3+)화Zn~(2+)대미량In~(3+)적광보측정존재엄중적기체간우,제출일충인여자、철조분리,병사인득이부집적환원-공침정전처리방법.용Na_2 SO_3용액장자배사산침액중대량Fe~(3+)환원성Fe~(2+),조절용액pH치위4.0~4.5,용액중소량미피환원적Fe~(3+)형성Fe(OH)_3침정,In~(3+)야이In(OH)_3형식공침정이득도부집,대량Zn~(2+)화Fe~(2+)칙류재용액중.부집인적려니용산용해,이원자흡수광보법측정인.해방법대인부집솔체도98%이상,자화철적거제솔분별체도90 %이상,기본만족인광보측정적요구.
In view of the serious matrix interference brought high concentration of Fe~(3+) and Zn~(2+) in a-cidic leaching solution of zinc calcine in the spectrometric determination of trace indium, a reduction-co precipitation pre-treatment method was proposed. By this method, indium could be enriched while be-ing roughly separated from Zn and Fe. After most Fe~(3+) was reduced to Fe~(2+) by Na_2 SO_3, the leaching solution was adjusted to pH 4.0-4.5, so that the residual Fe~(3+) was precipitated into Fe(OH)_3 and In~(3+) was enriched in the form of In(OH)_3 through precipitation while Fe~(2+) and Zn~(2+) were left in the liquid solution. The filter mud for enriching indium was dissolved in hydroehloride before atomic ab-sorption spectrometric determination. Through the method, 98 % indium could be enriched while 90 % Zn and Fe could be removed, which basically met the requirements of spectrometric determina-tion.