本方法使用戴安公司双三元液相色谱系统（Ultimate 3000 DGLC）在线固相萃取技术（online SPE），实现 样品在线富集及基体去除。Acclaim® surfactant色谱柱可 以实现对含不同碳数的LAS的基线分离，紫外检测器即 可直接检测。以IonPac NG1 柱做在线SPE柱，可以兼容 100%水相，且可反复使用，节约成本。 本方法适于纺织品中十二烷基苯磺酸钠（LAS）的 测定，样品干扰少，回收率高，检出限明显低于国标方 法。根据测定需要，还可增大进样量以进一步降低检出 限。

The Thermo Scientific HPLC system is applied for the analysis of tetra-alkylammonium salts. The separation is performed on a Thermo Scientific Acclaim Surfactant column, with suppressed conductivity detection.

The Thermo Scientific HPLC system is applied for the analysis of cationic surfactants. The separation is performed on a Thermo Scientific Acclaim Surfactant column, with suppressed conductivity detection.

The Thermo Scientific HPLC system is applied for the analysis of quaternary surfactants. The separation is performed on a Thermo Scientific Acclaim Surfactant column, with suppressed conductivity detection.

The Thermo Scientific HPLC system is applied for the analysis of cetylpyridinium chloride in mouthwash. The separation is performed using a Thermo Scientific Acclaim Surfactant column, with suppressed conductivity detection.