HH-624毛细管柱 加成物表面活性剂中游离环氧丙烷含量的测定

加成物表面活性剂中游离环氧丙烷含量的测定，液化石油气，二甲醚，甲缩醛，乙缩醛，乙醇，室内空气，焦炉煤气，变压器油，多氯联苯，植物油，增塑剂，塑化剂，过氧化物，乙酸乙酯，口罩

加成物表面活性剂中游离环氧丙烷含量的测定
加成物表面活性剂中游离环氧丙烷含量的测定 详细信息：

名称：毛细管柱
固定相：6 %腈丙基苯基 94 %二甲基聚硅氧烷，
规格：60m*0.32mm*1.8um
型号：HH-624

应用：HG/T 5626-2019 工业用乙酸甲酯

传统的非离子表面活性剂一般为脂肪醇或烷基酚的乙氧基化物。含有环氧乙烷 (Eo)和环氧丙烷(PO)能改变非离子表面活性剂的物理性能和表面活性。多年来,许多表面活性剂厂商一直在利用这种作用。 PO的疏水性比EO的疏水性强。事实上,如果PO链足够长(PO≥15),就成为表面活性剂的疏水基。在BASF Wya-ndette的Pluronie系列产品中,聚丙二醇是疏水基,是熟知的例子。联合碳化物公司的Tergitol X非离子表面活性剂,即单官能团低碳醇丙氧基化的乙氧化物(表1,结构A)是另一类例子,PO链中含一些EO基团。象辛醇那样的中碳醇只需加入极少量

BS ISO 19619:2018规定了测定由环氧丙烷共聚物合成的表面活性剂中游离环氧丙烷的分析程序。该方法适用于通过顶空气相色谱（HS-GC）和基于外部程序的火焰离子化检测器（FID）定性和定量测定环氧丙烷加合物、聚醚和聚乙二醇酯中的环氧丙烷基团。气相色谱-质谱（GC-MS）用于确认目的。

加成物表面活性剂中游离环氧丙烷含量的测定 测试谱图：




Determination of free propylene oxide content in adduct surfactant

Details of determination of free propylene oxide content in adduct surfactant:



Name: capillary column

Stationary phase: 6% cyanopropyl phenyl 94% dimethyl polysiloxane,

Specification: 60m * 0.32mm * 1.8um

Model: HH-624



Application: HG/T 5626-2019 Methyl acetate for industrial use




Traditional non-ionic surfactants are usually ethoxylates of fatty alcohols or alkyl phenols. The presence of ethylene oxide (Eo) and propylene oxide (PO) can change the physical properties and surface activity of non-ionic surfactants. For many years, many surfactant manufacturers have been taking advantage of this effect. The hydrophobicity of PO is stronger than that of EO. In fact, if the PO chain is long enough (PO ≥ 15), it becomes the hydrophobic group of the surfactant. Among the Pluronie series products of BASF Wya ndette, polypropylene glycol is a hydrophobic group, which is a well-known example. Tergitol X non-ionic surfactant of Union Carbide, namely mono functional low carbon alcohol propoxylated ethoxide (Table 1, Structure A), is another example. The PO chain contains some EO groups. Medium alcohols like octanol only need to add a small amount



BS ISO 19619:2018 specifies the analytical procedure for the determination of free propylene oxide in surfactants synthesized from propylene oxide copolymers. This method is applicable to the qualitative and quantitative determination of propylene oxide groups in propylene oxide adducts, polyethers and polyethylene glycol esters by headspace gas chromatography (HS-GC) and flame ionization detector (FID) based on external procedures. Gas chromatography-mass spectrometry (GC-MS) is used for confirmation purposes.



Determination of free epoxy propane content in adduct surfactant Test spectrogram: