云南化工
雲南化工
운남화공
Yunnan Chemical Technology
2015年
5期
32-35
,共4页
火焰原子吸收法%磷矿石%磷酸%铬
火燄原子吸收法%燐礦石%燐痠%鉻
화염원자흡수법%린광석%린산%락
flame atomic absorption spectrometry%phosphate rock%phosphate%chromium
研究了火焰原子吸收光谱法测定磷矿石、磷酸中铬的方法，磷矿石试样经消解液溶解，磷矿石试液、磷酸试液分别以盐酸和硝酸为介质，加入一定量 KCl 溶液，于波长357．9nm 处测量试样吸光值，由标准加入曲线得出铬含量。本方法磷矿石与磷酸样品的加标回收率分别为96．2～104．6％和97．4～105．9％，磷矿石与磷酸样品的相对标准偏差分别为1．97％～3．16％和3．86％～5．28％，精密度和准确度较高。
研究瞭火燄原子吸收光譜法測定燐礦石、燐痠中鉻的方法，燐礦石試樣經消解液溶解，燐礦石試液、燐痠試液分彆以鹽痠和硝痠為介質，加入一定量 KCl 溶液，于波長357．9nm 處測量試樣吸光值，由標準加入麯線得齣鉻含量。本方法燐礦石與燐痠樣品的加標迴收率分彆為96．2～104．6％和97．4～105．9％，燐礦石與燐痠樣品的相對標準偏差分彆為1．97％～3．16％和3．86％～5．28％，精密度和準確度較高。
연구료화염원자흡수광보법측정린광석、린산중락적방법，린광석시양경소해액용해，린광석시액、린산시액분별이염산화초산위개질，가입일정량 KCl 용액，우파장357．9nm 처측량시양흡광치，유표준가입곡선득출락함량。본방법린광석여린산양품적가표회수솔분별위96．2～104．6％화97．4～105．9％，린광석여린산양품적상대표준편차분별위1．97％～3．16％화3．86％～5．28％，정밀도화준학도교고。
The method for determination of chromium in phosphate ore and phosphoric acid by flame atomic absorption spectrometry was studied.Phosphate rock sample was dissolved in Lye nitrate solution,a certain amount of KCl solution was added to the test solution of phosphate rock and phosphoric acid with hy-drochloric acid and nitric acid as the medium respectively,the samples’absorbance values were measured at a wavelength of 357.9nm,and the chromium content was obtained by the standard addition curve.The phos-phate rock and phosphoric acid samples spiked recoveries of this method are between 96.2 ~104.6%,and 97.4 ~105.9% respectively,the relative standard deviation of phosphate rock and phosphate samples were 1.97 -3.16% and 3.86% -5.28%,this method is of high precision and accuracy.
