For fiber content analysis, what is the difference between using dimethylformamide (DMF) and using dimethylacetamide?

GB/T 2910.20-2009 is equivalent to the ISO/CD 1833-2006 standard. Dimethylacetamide is used for dissolving spandex, while dimethylformamide is used for the industry standard FZ/T 01095-2002. Both materials can dissolve the spandex, but the dissolution conditions are not the same. The dissolution condition of FZ/T 01095 is boiling water 20min, the dissolution condition of GB/T 2910.20 is 60°C, 20min, the latter condition is easier to operate, and the use of dimethyl b Amide dissolves spandex faster.