Mull technique is the only technique which can be used for
Ethacrynic acid. silicon oil is used to grind sample and in it. irt
is placed on sodiun cells and cells are overlapped and kept in
holder in FTIR apparatus.
Some examples that would be considered an acid: sulfuric acid, nitric acid, hydrofluoric acid, perchloric acid, boric acid, periodic acid, salicilic acid, stearic acid, citric acid, oxalic acid, etc.