电感耦合等离子体发射光谱法测定有机染料油溶红中八个杂质元素

本文提出用电感耦合等离子体发射光谱法 (ICP- AES)同时测定有机染料油溶红产品中 Fe、Al、Cu、Pb、 Zn、 Cr、 Mn、 Ti等八个杂质元素的分析方法。试样前处理采用 H2 SO4、 HNO3分步炭化 ,5 0 0℃灰化 ,灰分用 HCl+ H2 O2 预溶解 ,再用 VHCl∶ VHNO3 =1∶ 1混酸提取。该法检出限 :0 .15 (mg· L- 1 ) Fe;1.7×10 - 2 (mg· L- 1 ) Al;5 .0× 10 - 3 (m g·L- 1 ) Cu;0 .2 0 (mg· L- 1 ) Pb;2 .7× 10 - 2 (mg· L- 1 ) Zn;5 .7×10 - 3 (m g· L- 1 ) Cr;1.3× 10 - 3 (m g·L- 1 ) Mn;2 .1× 10 - 3 (mg· L- 1 ) Ti。精密度 RSD(n =5 ) 0 .8%～ 2 1.5 %。加标回收率 84.6 %～ 118.6 %。

Determination of Eight Impurity Elements in Organic Dye Oil Red by ICP-AES

Simultaneous determination of metal impurities of Fe, Al, Cu, Pb, Zn, Cr, Mn and Ti in organic dye oil red by inductively coupled plasma atomic emission spectrometry (ICP-AES) is presented in this paper. Different sample digestion procedures were compared, and methods for the elimination of spectrum interference were investigated. The proposed sample digestion procedure includes charring with concentrated sulfuric acid and nitric acid, cineration at 500 degrees C, and step-wisely extracting the residue with hydrochloric acid plus peroxide of hydrogen, and hydrochloric acid plus nitric acid (VHCl:VHNO3 = 1:1). The detection limits are 0.15 mg.L-1 for Fe, 1.7 x 10(-2) mg.L-1 for Al, 5.0 x 10(-3) mg.L-1 for Cu, 0.20 mg.L-1 for Pb, 2.7 x 10(-2) mg.L-1 for Zn, 5.7 x 10(-3) mg.L-1 for Cr, 1.3 x 10(-3) mg.L-1 for Mn, 2.1 x 10(-3) mg.L-1 for Ti, respectively. The precision of the method is in the range of 0.8%-21.5% (n = 5), and recovery in the range of 84.6%-118.6%.