钢中微量硼的光度测定,目前国内较为普遍采用的是次甲基兰-二氯乙烷萃取光度法、姜黄素直接光度法、二蒽醌亚胺和HPTA直接光度法。 最近我们对上述四种方法,重点是姜黄素法作了一些试验,感到四种方法各有其特点(表1)。而各种方法最大灵敏度曲线如图1。 Spectrophotometric determination of trace boron in steel is currently more commonly used in China is methylene blue - dichloroethane extraction spectrophotometry, curcumin direct spectrophotometry, anthraquinone imine and HPTA direct spectrophotometry. Recently, we have conducted some tests on the above four methods, focusing on the curcumin method, and we feel that each of the four methods has its own characteristics (Table 1). The maximum sensitivity of various methods shown in Figure 1.