作　　者： ; ; ;

机构地区： 青岛科技大学化工学院

出　　处： 《质谱学报》 2007年第3期179-184,共6页

摘　　要： 采用高效液相色谱-电喷雾质谱法(HPLC-ESI/MS)分析非离子表面活性剂烷基多苷(APGs)的组成与结构,并探讨加合离子形成的机理。APGs在反相柱上按照不同的碳链长度和糖基聚合度被分离。在负离子模式下,各组分主要以脱质子离子[M—H]-的形式被检测到;在正离子模式下,APGs中的各组分能够以质子化分子离子[M+H]+或阳离子加合物[M+NH4]+、[M+Na]+和[M+K]+的形式被检测。采用提取离子色谱的处理方法研究加合离子形成的机制。加合离子的形成与糖苷分子的结构有关,吡喃糖苷与H+、NH4+、Na+和K+均能形成加合离子,而呋喃糖苷加合离子的形成具有选择性,只与Na+和K+表现出较强的加合能力。 The identification of different components in nonionic surfactants-alkyl polyglucosides （APGs） mixture was achieved by high performance liquid chromatography-electrospray ionization mass spectrometry （HPLC-ESI/MS） and the possible mechanism for the formation of adduct ions was discussed. The APGs were separated according to their different alkyl chain lengths and number of glucoside units. Individual components could be detected as cationized ions [M＋H]^＋, [M＋NH4]^＋, [M＋Na]^＋ or [M＋K]^＋ ,in positive ion mode and as deprotonated ions in negative ion mode. The mechanism for the formation of adducts ions was studied by extracted ion chromatography （EIC）. The formation of adducts ions can be effected by molecule structure of alkyl glucosides. The alkyl glucopyranosides exhibit high tendency to form adducts ions without selectivity, whereas glucofuranosides manifest much higher selectivity towards Na^＋ and K^＋ compared with H^＋ and NH4^＋ .

关 键 词： 高效液相色谱 电喷雾质谱法 非离子型表面活性剂 烷基多苷

领　　域： [理学] [理学]