In this paper a potentiometric titration was used to improve the neutral sodium sulfite method for determining the content of formaldehyde, and the accuracy and influential factors were discussed.
采用电位滴定法改进了测定甲醛含量的中性亚硫酸钠法，并对其准确度和影响因素进行了探讨。
In this paper, FDNB method, UV-spectrophotometry, Formaldehyde reaction-titration method and Viscometry were tried to use in measuring the gelatin hydrolysis degree in the process of the reaction.
本文探讨了FDNB、紫外分光光度法、甲醛反应滴定法、粘度法测定明胶水解程度的可能性，并对他们作了一定的研究。
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