CAJ | 학술논문

在磷酸介质中,冒烟高氯酸氧化钨成高价，并消除溶液中存在的还原物质的影响，用氯化亚锡及三氯化钛还原铁和钨，约3.6mol/L盐酸介质中，硫氰酸铵与钨（Ⅴ）生成黄色络合物，通过测其吸光度可定量测定钨含量。由于较多量冒烟高氯酸的氧化作用，还原不需铁作催化剂，消除了基体铁的影响。测定质量分数范围为0.05％～10％。
재린산개질중,모연고록산양화오성고개，병소제용액중존재적환원물질적영향，용록화아석급삼록화태환원철화오，약3.6mol/L염산개질중，류청산안여오（Ⅴ）생성황색락합물，통과측기흡광도가정량측정오함량。유우교다량모연고록산적양화작용，환원불수철작최화제，소제료기체철적영향。측정질량분수범위위0.05％～10％。
A method for the determination of tungsten content in steel andalloys by perchloric acid oxidation－photometry is reported. Tungsten in steel and alloys is oxidized to high valence by enough perchloric acid in the medium of phosphoric acid, at the same time the interference of matrix iron and reducing substances is eliminated. Then in an approx 3.6 mol/L chlorhydric acid medium tungsten is reduced by SnCl2 and TiCl3, and a yellow complex of tungsten(Ⅴ) with ammonium thiocyanate is formed. Tungsten can be quantified by detection of absorbance of the complex, the determination range is 0.05％～10％ for tungsten. The method was found to be simple and suitable to the determination of tengsten in reference materials.