冶金分析
冶金分析
야금분석
METALLURGICAL ANALYSIS
2001年
1期
14-16
,共3页
吕海涛%尹西竹%丁采真%牟世芬
呂海濤%尹西竹%丁採真%牟世芬
려해도%윤서죽%정채진%모세분
螯合离子色谱法%球墨铸铁%稀土
螯閤離子色譜法%毬墨鑄鐵%稀土
오합리자색보법%구묵주철%희토
利用螯合离子色谱法测定了球墨铸铁中稀土含量。通过选择性螯合树脂和磺酸型阳离子交换树脂,选用适当的流动相将样品中大量的铁和其它金属离子除去,同时浓缩富集待测的稀土金属离子。再选用草酸和二甘醇酸的梯度淋洗体系,在含有阴、阳离子双功能基的分析柱上将14种稀土分离,继用在线柱后衍生和光度法检测,检测限(信噪比为3∶1)可以达到ng/mL。
利用螯閤離子色譜法測定瞭毬墨鑄鐵中稀土含量。通過選擇性螯閤樹脂和磺痠型暘離子交換樹脂,選用適噹的流動相將樣品中大量的鐵和其它金屬離子除去,同時濃縮富集待測的稀土金屬離子。再選用草痠和二甘醇痠的梯度淋洗體繫,在含有陰、暘離子雙功能基的分析柱上將14種稀土分離,繼用在線柱後衍生和光度法檢測,檢測限(信譟比為3∶1)可以達到ng/mL。
이용오합리자색보법측정료구묵주철중희토함량。통과선택성오합수지화광산형양리자교환수지,선용괄당적류동상장양품중대량적철화기타금속리자제거,동시농축부집대측적희토금속리자。재선용초산화이감순산적제도림세체계,재함유음、양리자쌍공능기적분석주상장14충희토분리,계용재선주후연생화광도법검측,검측한(신조비위3∶1)가이체도ng/mL。
In this paper, the contents of trace lanthanides in nodular cast iron were determined by chelating ion chromatography. By selective chelating resin and sulfonated cation exchanger, lanthanides were concentrated, while eliminating bulk quantities of iron and other metals from sample matrix. The concentrated lanthanides, which were separated on a mixed-bed ion exchange column, were eluted by a concentration gradient of oxalic acid and diglycolic acid, coupled with postcolumn and detected by spectrophotometry. The method detection limits (signal-to-noise ratio 3∶1) were at ng/mL levels.