摘要
根据烷基酚聚氧乙烯醚(APEO)、直链烷基苯磺酸盐(NABS)及脂肪醇硫酸盐(ALAS)3种表面活性剂的热裂解特征,提出了热裂解-气相色谱-质谱法(PGC-MS)检测水性涂料中上述3种表面活性剂的方法。水性涂料样品经在120℃烘干后粉碎,以正丁醇为溶剂对样品进行超声提取,除去溶剂后烘干,即得到含有表面活性剂组分的样品干膜,此样品供PGC-MS分析。样品在600℃裂解6s后,APEO的裂解产物为烷基酚和含有乙氧基单体的化合物;NABS裂解后生成烯烃和烷基苯的同系物;ALAS则裂解生成二氧化硫、烯烃和脂肪醇。根据GC-MS分析所得结果,即可对水性涂料中表面活性剂的类型作定性检测。方法的检出限(3S/N)均小于100mg·kg-1。
Based on their pyrolytic characteristics,category of the 3surfactants i.e.alkylphenyl-polyethylene oxide ethers(APEO),normal alkylbenzene sulfonates(NABS)and apliphatic alcoholic sulfates(ALAS)present in water-thinned coating,was detected by pyrolysis-GC-MS.The water-thinned coating sample was dried at 120 ℃,crushed and extracted ultrasonically with n-butanol.The extract was evaporated to expel the solvent and dried by heating.The menbrane-shaped sample thus obtained was used for GC-MS analysis after pyrolysis at 600℃for 6s.It was shown that the pyrolyzates of APEO were alkylphenols and compounds containing monomer of epoxy group;the pyrolyzates of NABS were olefines and homologues of alkyl benzene;and the pyrolyzates of ALAS were SO2,olefines and aliphatic alcohols.The category of surfactants present in the water-thinned coating can thus be determined from the analytical data found by GC-MS.Detection limits(3S/N)found for this method were all less than 100mg·kg-1.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2014年第6期665-669,共5页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
质检公益性行业科研专项资助(2012104011-14)
