在生产中利用电位滴定法测定干红葡萄酒中SO_2的含量，避免了直接碘量法终点识别的困难。
During the production, determination of SO_2 (sulphur dioxide) in dry red wine using potentiometric titration avoids the end-point recognition difficulty compared with using iodometry method.
实验证明，用微量称量滴定法代替碘量法测定，可有效解决上述问题。
Experiments show that the above problems can be sufficiently solved with mini scalar quantity titration instead of iodine quantity method.
图2以直接直接碘滴定法与通气蒸馏法检测金针干制品二氧化硫残留量结果比较。
Figure2 Comparison of testing results on the sulfur dioxide residue of dried daylily products using direct titration method and Rankine method.
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