Before GC analysis, samples were silylated by the addition of 1mL N-methyl-N-trimethylethylsilylheptafluorobutyramide (MSHFBA) mixed with 50L of 1-imidazol methyl and heated for 5min at 103 ◦C.
Before GC analysis, samples were silylated by the addition of 1mL N-methyl-N-trimethylethylsilylheptafluorobutyramide (MSHFBA) mixed with 50L of 1-imidazol methyl and heated for 5min at 103 ◦C.