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文献已报导了在高氯酸介质中选择适当条件使硅酸盐不完全显色用双波长法测定高硅样品中的痕量磷。由于硅钼兰和磷钼兰的最大吸收仅差15nm,灵敏度较低。本文根据硅酸盐和磷酸盐能在钼-锑-tritonX-100-体钛系中形成最大吸收相差110nm的稳定络合物以及双波长法原理,利用220A型分光光度计的多波长扫描程序,在三个波长下测定,一次比色同时获得硅磷两元素的结果。加之两种钼蓝均能室温显色,手续非常简便。本文采用抗坏血酸加
The literature has reported the determination of trace amounts of phosphorus in high-silicon samples using the dual-wavelength method by selecting the appropriate conditions in the perchloric acid medium to make the silicate incompletely developed. As the silicon molybdenum blue and phosphorus molybdenum blue absorption maximum difference of only 15nm, lower sensitivity. In this paper, based on silicate and phosphate can form a stable complex with maximum absorption difference of 110nm in the molybdenum-antimony-triton X-100-body titanium system and the principle of dual-wavelength method, using multi-wavelength scanning program of 220A spectrophotometer, Measured at three wavelengths, a colorimetric obtained at the same time two elements of silicon and phosphorus results. Coupled with two kinds of molybdenum blue can be at room temperature color, the procedure is very simple. In this paper, ascorbic acid plus