鑒別馬來(lái)酸酐和順式酸的方法：
The method of identifying maleic anhydride and CIS acid was as follows
1.稱(chēng)量相同的重量，將其溶于水，然后用堿滴定。 酸是更多的堿，酸是更少。
1. Weigh the same weight, dissolve it in water, and titrate with alkali. Acids are more bases and less acids.
2，或取少量等量的樣品溶于水，用pH計(jì)檢測(cè)，較低的pH是酸酐，較高的pH是酸。
2, or take a small amount of the same amount of sample dissolved in water, detected by pH meter, lower pH is anhydride, higher pH is acid.
順丁烯二酸酐
Maleic anhydride
3.也可以通過(guò)熔點(diǎn)檢測(cè)，酸酐和酸的熔點(diǎn)不同。 馬來(lái)酸酐為約52?53℃，且酸為約130℃。
3. The melting point of anhydride and acid is different. Maleic anhydride is about 52-53 ℃, and acid is about 130 ℃.
4，簡(jiǎn)單的方法，找到一小塊不銹鋼，將兩個(gè)樣品稍微放在鋼板的兩邊，用打火機(jī)加熱兩個(gè)樣品之間，液化和揮發(fā)的是馬來(lái)酸酐。
4. Simple method: find a small piece of stainless steel, put two samples slightly on both sides of the steel plate, and heat the two samples with a lighter. The first thing to liquefy and volatilize is maleic anhydride.
