【摘要】 论文对测定退浆废水中聚乙烯醇(PVA)和淀粉的浓度进行了研究,利用普通分光光度仪,通过双波长分光光度法进行了分析和讨论,得到了适宜的实验条件:2.5%的硼酸5mL,1.27%的碘溶液2mL,显色时间为15～20min。还得到了双波长分光光度法测定PVA和淀粉浓度的计算式。实验表明:用该方法同时测定双组分含量,既简便又准确。更多还原

【Abstract】 The study is concerning measurement of concentration of polyvinyl alcohol(PVA) and starch of desizing wastewater.The experiment adopted dual-wavelength spectrophotometry with commom spectrophotometer,received the suitable condition:2.5% boric acid 5 mL,1.27% io- dine 2 mL,coloration time is 15～20min.And received the formula of concentration of PVA and starch.It shows the method is simple and accurate.更多还原