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.
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。
2
That's the point. If so, I'm sure you'll get the exact sulphur content next time.
这才是问题关键，我保证下次提供精确的硫含量。
3
Dew point corrosion can be effectively avoided by using qualified sulphur as raw material and installing heat pipe element in the low temperature section of economizer.