甲基百里香酚蓝分光光度法测定铝合金中钛

doi:10.13228/j.boyuan.issn1000-7571.011706

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摘要准确、灵敏、快速地测定钛在铝合金材料中的含量,对提高铝合金材料的机械性能有重要意义。通过加入氢氧化钠溶液和双氧水溶解样品, Fe³⁺干扰可通过加入酒石酸钾钠溶液来消除, Zn²⁺干扰可通过加入二巯基丙磺酸钠溶液来掩蔽,Cu²⁺的干扰可通过加入铜试剂的方法来去除。使用稀H₂SO₄来控制体系的酸度,加入混合增敏剂阿拉伯树胶和聚乙烯醇,常温下甲基百里香酚蓝溶液会与钛发生显色反应形成稳定的蓝紫色络合物,利用该特性,实现了分光光度法对铝合金中钛的测定。实验结果表明:显色体系最大吸收峰为570 nm,钛质量浓度在小于1.6 μg/mL时与吸光度呈线性关系,线性相关系数r为0.999 4,方法检出限为2×10^-8(质量分数),表观摩尔吸光系数为4.7×10⁴ L·mol^-1·cm^-1。方法用于测定铝合金样品中钛的含量,结果的相对标准偏差(RSD,n=6)为2.1%~3.0%,加标回收率在97%～105%之间,测定值与采用GB/T 20975.12—2008的测定值基本一致。

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	丁邦琴
	金文斌
	张海滨
	赵鑫

关键词 ：钛, 甲基百里香酚蓝, 分光光度法, 铝合金, 增敏剂

Abstract：Accurate, sensitive and rapid determination of titanium content in aluminum alloy materials is of great significance for improving the mechanical properities of aluminum alloy materials. The sample was dissolved with sodium hydroxide solution and hydrogen peroxide. Potassium sodium tartrate solution, sodium dimercaptopropyl sulfonate solution and copper reagent were added respectively to eliminate the interference of Fe³⁺, Zn²⁺ and Cu²⁺. Dilute sulfuric acid was used to control the acidity of the system, and the mixed sensitizers composed of Arabic gum and polyvinyl alcohol were added. Methylthymol blue solution could react with titanium to form a stable blue-violet complex at room temperature. Based on this characteristic, the determination of titanium in aluminum alloy was realized by spectrophotometry. The experiment results showed that the maximum absorption peak of the chromogenic system was located at 570 nm. The mass concentration of titanium in the solution is linearly related to the absorbance within 1.6 μg/mL. The linear correlation coefficient (r) of calibration curve was 0.999 4. The limit of detection was 2×10^-8 (mass fraction). The apparent molar absorption coefficient was 4.7×10⁴ L·mol^-1·cm^-1. The proposed method was applied for determination of titanium in aluminum alloy samples. The relative standard deviations (RSD, n=6) of the determination results were between 2.1% and 3.0%. The recoveries were between 97% and 105%. The results were basically consistent with those obtained by GB/T 20975.12-2008.

Key words： titanium methylthymol blue spectrophotometry aluminum alloy sensitizer

收稿日期: 2021-12-08

ZTFLH:	O657.32
	TF821
	TF03+1

基金资助:江苏省南通市基础科学研究(JC2021021)

作者简介: 丁邦琴(1971—),女,副教授,硕士,主要研究方向为分析化学教学与研究;E-mail: 183631792@qq.com

引用本文:

丁邦琴, 金文斌, 张海滨, 赵鑫. 甲基百里香酚蓝分光光度法测定铝合金中钛[J]. 冶金分析, 2022, 42(12): 91-94. DING Bangqin, JIN Wenbin, ZHANG Haibin, ZHAO Xin. Determination of titanium in aluminum alloy by methylthymol blue spectrophotometry. , 2022, 42(12): 91-94.

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http://yjfx.chinamet.cn/CN/10.13228/j.boyuan.issn1000-7571.011706 或 http://yjfx.chinamet.cn/CN/Y2022/V42/I12/91

[1] 薛光荣,夏敏勇.N₂O-C₂H₂火焰原子吸收光谱法测定铝合金中钛[J].冶金分析,2008,28(3):71-74.
XUE Guangrong,XIA Minyong.Determination of titanium in aluminum alloy by N₂O-C₂H₂ flame atomic absorption spectrometry[J].Metallurgical Analysis,2008,28(3):71-74.
[2] 刘平,杨军红,刘浩新.改进的可见光谱法测定铝合金中钛[J].理化检验(化学分册),2009,45(11):1289-1291,1295.
LIU Ping,YANG Junhong,LIU Haoxin.Modification of visual spectroscopic determination of titanium in aluminum alloys[J].Physical Testing and Chemical Analysis(Part B:Chemical Analysis),2009,45(11):1289-1291,1295.
[3] 邓桂春,臧树良.铝合金中钛的光度分析法研究[J].理化检验(化学分册),2001,37(11):501-502,504.
DENG Guichun,ZANG Shuliang.Photometric determination of titanium in aluminum alloy[J].Physical Testing and Chemical Analysis(Part B:Chemical Analysis),2001,37(11):501-502,504.
[4] 张统,顾玲玲,鞠云姣.二溴羟基苯基荧光酮分光光度法测定钛[J].冶金分析,2000,20(6):41-43.
ZHANG Tong,GU Lingling,JU Yunjiao.Determination of titanium by dibromohydroxyphenylfluorone spectrophotometry[J].Metallurgical Analysis,2000,20(6):41-43.
[5] 周之荣,周瑜芬,牛建国,等.氧化偶氮胂M褪色光度法测定痕量钛(Ⅳ)[J].分析试验室,2005,27(5):51-54.
ZHOU Zhirong,ZHOU Yufen,NIU Jianguo,et al.Kinetic spectrophotometrc determination of trace titanium(Ⅳ) based on discoloration of arsenazo M oxidized by potassium bromate[J].Chinese Journal of Analysis Laboratory,2005,27(5):51-54.
[6] 李红,张欣.二安替比林甲烷光度法测定氯化镁中钛[J].冶金分析(Metallurgical Analysis),2005,25(2):93-94
[7] 卢钒,杨浩义,钟国秀.二安替比林甲烷光度法测定钼合金中钛[J].兵器材料科学与工程,2011,34(5):99-101.
LU Fan,YANG Haoyi,ZHONG Guoxiu.Spectrophotometric determination of titanium in molybdenum alloy by diantipyrinemethane[J].Ordnance Material Science and Engineering,2011,34(5):99-101.
[8] 邓秀琴,喻育红.二安替比林甲烷光度法测定高碳铬铁中微量钛[J].天津冶金,2008(3):61-62,80.
DENG Xiuqin,YU Yuhong.Measurement and determination of trace titanium in high carbon ferrochrome by diantipyryl methane photometric method[J].Tianjin Metallurgy,2008(3):61-62,80.
[9] 邓军华,王一凌,亢德华.二安替比林甲烷光度法测定高碳锰铁中钛含量[J].铁合金,2017(2):42-45.
DENG Junhua,WANG Yiling, KANG Dehua.Determination of titanium content in high-carbon ferromanganese with diantipyrylmethane spectrophotometry[J].Ferro-Alloys,2017(2):42-45.
[10] 程鑫.二安替比林甲烷分光光度法测定钛矿石物相的钛含量[J].分析仪器,2020(4):118-121.
CHENG Xin.Determination of titanium content in titanium ore phase by diantipyrylmethane spectrophotometric method[J].Analytical Instrumentation,2020(4):118-121.
[11] 邹时英,王蓉,付大友.甲基百里酚蓝分光光度法测定食品中铅[J].中国调味品,2012,37(9):89-91.
ZOU Shiying,WANG Rong,FU Dayou.Spectropho-tometrc determination of lead in foods with methyl thymol blue[J].China Condiment,2012,37(9):89-91.
[12] 金文斌,赵鑫,刘瑞华.甲基百里香酚蓝分光光度法测定大豆中微量锌的研究与应用[J].天津化工,2021,35(3):41-42.
JIN Wenbin,ZHAO Xin,LIU Ruihua.Study and application of methy thymol blue spectrophotometry for determination of zinc[J].Tianjin Chemical Industry,2021,35(3):41-42.