CAJ | 학술논문

亚磷酸锌是一种优秀的防锈颜料,广泛应用于涂料行业当中.根据亚磷酸根具有还原性,设计在硫酸介质中,用重铬酸钾溶液氧化亚磷酸根,过量的重铬酸钾用硫酸亚铁铵反滴定,1,10-菲绕啉作为指示剂确定滴定终点.此方法测定亚磷酸根含量,在8～72 mg呈良好的线性关系,检出限为8 mg,相对标准偏差(RSD)＜1.27%,回收率在99.87%～100.22%,方法简便、可靠,可在实际中应用.
아린산자시일충우수적방수안료,엄범응용우도료행업당중.근거아린산근구유환원성,설계재류산개질중,용중락산갑용액양화아린산근,과량적중락산갑용류산아철안반적정,1,10-비요람작위지시제학정적정종점.차방법측정아린산근함량,재8～72 mg정량호적선성관계,검출한위8 mg,상대표준편차(RSD)＜1.27%,회수솔재99.87%～100.22%,방법간편、가고,가재실제중응용.
Zinc phosphite was an excellent preservative pigment which was extensively applied in coating industry. In terms of the reductibility of phosphorous acid, the phosphorous acid was oxidized with potassium bichromate in sulfuric acid. Excessive potassium bichromate could be titrated with ammonium ferrous sulfate, and 1,10-phenanthroline indicated the end point of titration and estimated the phosphorous acid content. A good linear relationship was presented between 8～72 mg. The detection limit was 8mg and the relative standard deviation was less than 1.27%. The recovery rate was between 99.87%～100.22%.