【摘要】 腈纶纤维中磺酸基团含量的多少对于染色性能影响很大。腈纶纤维中磺酸基团含量的测定,通常是用化学分析法,如离子交换后的酸碱滴定和重量法定硫。这些方法操作繁琐,精度差,由于纤维中以R-SO₃Na形式存在,因而可以采用测定钠的含量间接求得纤维中磺酸基团的含量。本文介绍采用原子吸收光谱法测定纤维中含钠量,并摸索了原子吸收分析中纤维基体和火焰条件测定的影响,确定了间接测定纤维中磺酸基团的工作条件。试样分析的结果较为满意。更多还原

【Abstract】 The content of sulfonic acid groups in PAN fibers has a remarkable bearing on their dyeing behaviors. The cotent is usually measured by chmical analysis method, i.e., subjecting the fiber to acid-basic titration after ion-exchange and determination of sulfur by qravimetric analysis. This method, however, suffers from complexity in operation and lack of accuracy. On account of their existence in the form of RSO₃Na within the fiber, the content of the sulfonic acid groups can be indirectly found by measuring the content of sodium in the fiber.In this paper is presented the way to measure the sodium by means of atomic absorption spectromotry method. A preliminary assessment is made of the influence of the fiber matrix and flame condition on the measurement; and the working parametersof such indirectly measurement are thus defined. An analysis of the samples has yielded satisfactory results.更多还原