鑒別馬來酸酐和順式酸的方法：
The method of identifying maleic anhydride and CIS acid was as follows
1.稱量相同的重量，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計檢測，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.也可以通過熔點檢測，酸酐和酸的熔點不同。 馬來酸酐為約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，簡單的方法，找到一小塊不銹鋼，將兩個樣品稍微放在鋼板的兩邊，用打火機加熱兩個樣品之間，首先液化和揮發的是馬來酸酐。
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.
