By taking N,N-dimethyl dodecylamine and 1,4-dibromobutane as raw material to synthesize bisquaternary ammonium salt,the product of bisquaternary ammonium salt is analyzed quantitatively.

• 以自制的N,N-二甲基十二烷基叔胺和1,4-二溴丁烷为原料合成了双季铵盐。