Indirect determination of chlorine in zinc oxide dust by flame atomic absorption spectrometry
WANG Ya-jian1,2,3, ZHANG Li-bo*1,2,3, PENG Jin-hui1,2,3, SUN Cheng-yu4, JU Shao-hua1,2,3, ZHANG Xu3
1. Yunnan Provincial Key Laboratory of Intensification Metallurgy, Kunming 650093, China; 2. Key Laboratory of Unconventional Metallurgy, Ministry of Education, Kunming 650093, China; 3. Faculty of Metallurgy and Energy Engineering, Kunming University of Science and Technology, Kunming 650093, China; 4. Yunnan Chihong Zn & Ge Co., Ltd., Qujing 655011, China
Abstract：The sample was dissolved in diluted nitric acid. Then, excessive Ag+ standard solution was added into the sample solution. Trace Cl- in sample solution would quantitatively reacted with Ag+ to form silver chloride colloid. The solution was heated and boiled to agglutinate rapidly and completely precipitate silver chloride colloid. The residual Ag+ content in filtrate was determined by flame atomic absorption spectrometry. Then, the content of chlorine in zinc oxide dust could be indirectly obtained. The interference of coexisting ions, the dissolution conditions of sample, the reaction time of precipitation and determination medium were discussed to obtain the optimal experimental conditions. The proposed method was applied to the determination of chlorine content in zinc oxide dust of fuming furnace and rotary kiln. The results were basically consistent with those obtained by silver chloride turbidimetry. The relative standard deviations (RSD, n=5) were 0.65%-0.89%. The recoveries were between 99% and 101%.
刘敬东, 齐峰. 离子选择性电极测定岩石矿物中的氯[J]. 化学分析计量(Chemical Analysis and Meterage), 2000, 9(3):22-23.
[11]
Aruscavage P J, Campbell E Y. An ion-selective electrode method for determination of chlorine in geological materials[J]. Talanta, 1983, 30(10): 745-749.
[12]
肖晓辉, 陈振, 黄晓刚, 等. 中性浸出-硫氰酸汞-硫酸高铁铵分光光度法测定锌精矿中的氯量[J]. 岩矿测试(Rock and Mineral Analysis), 2008, 27(3):227-228.
[13]
陈芸平, 唐劲松. 硫氰酸汞分光光度法测定矿石中氯[J]. 岩矿测试(Rock and Mineral Analysis), 2008, 27(6):479-480.
[14]
杨萍. 比浊法测定铅锌精矿中的微量氯[J]. 分析试验室(Chinese Journal of Analysis Laboratory), 1996, 15(1):84-85.
[15]
李韩璞, 张旭, 毛圣华. 比浊法测定溶液中的微量氯离子的方法改进[J]. 江西理工大学学报(Journal ofJiangxi University of Science and Technology), 2011, 32(1):14-16.
[16]
Mesquita R B R, Fernandes S M V, Rangel A O S S. Turbidimetric determination of chloride in different types of water using a single sequential injection analysis system[J]. Journal of Environmental Monitoring, 2002, (4):458-461.
