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我们在用磺基水杨酸以分光光度法测定煤灰中Fe_2O_3的基础上,试验了在PH=2～4时,用抗坏血酸还原Fe~(3+)后,找出Ti~(4+)与磺基水杨酸的显色条件。这样可连续测定煤灰中的Fe~(3+)和Ti~(4+)。 1、Ti~(4+)与磺基水杨酸在PH=2～4时能生成黄色的络合物,M:R=1:3,ε=1.5×10~4,在380nm处有很强的吸收(见图1)。 2、Ti~(4+)与磺基水杨酸在PH=1.8～7范围内有较稳定吸光度(见图2)。因考虑Fe~(3+)的掩蔽,选PH=2～4。 3、Fe~(3+)干扰钛的测定,为此用PH
Based on the spectrophotometric determination of Fe_2O_3 in coal ash with sulfosalicylic acid, we found that when Ti ~ (4+) is reduced with ascorbic acid at pH = 2-4, With sulfosalicylic acid color conditions. In this way, Fe 3+ and Ti 4+ can be measured continuously. 1, Ti ~ (4+) and sulfosalicylic acid can form yellow complex at pH = 2-4, M: R = 1: 3, ε = 1.5 × 10 ~ 4, at 380nm Strong absorption (see Figure 1). 2, Ti ~ (4+) and sulfosalicylic acid in the PH = 1.8 ~ 7 have a more stable absorbance range (see Figure 2). Due to consider Fe ~ (3 +) masking, select PH = 2 ~ 4. 3, Fe ~ (3+) interference determination of titanium, for this purpose with PH