高效液相色谱法测定残渣中TA和BA的含量

• 作 者: 黄宪升 吴殿军
• 机 构: 抚顺石油学院辽阳分院,海城市产品质量监督检验所
• 出 处: 石油化工高等学校学报
• 发表日期: 1998年01期
• 关键词: 非极性键 BA TA 高效液相色谱法 反离子 对苯二甲酸 甲醇含量 流动相 变异系数 达世禄

应用高效液相色谱法，采用非极性键合硅胶固定相，以醋酸盐缓冲溶液为流动相，铜离子为反离子，ＵＶ２４０ｎｍ检测，内加法定量，同时测定了ＴＡ残渣中对苯二甲酸（ＴＡ）和苯甲酸（ＢＡ）的含量。考查了流动相中的甲醇含量、铜离子浓度和ｐＨ值的影响。ＴＡ和ＢＡ的回收率分别为９９．６％～１０９．０％和９１．４％～１０９．９％，变异系数分别小于０．９２％和７．４１％。该方法与气相色谱法相比，具有样品不需预处理、分析速度快等优点。

High performance liquid chromatography with a non-polar bonded silica stationary phase, acetate buffer solution as the mobile phase, copper ions as counterions, UV240nm detection, internal addition of quantitative determination TA residues in terephthalic acid (TA) and benzoic acid (BA) content. The effects of the methanol content in the mobile phase, the copper ion concentration and the pH value were examined. The recoveries of TA and BA were 99.6% -109.0% and 91.4% -109.9%, respectively, and the coefficients of variation were less than 0.92% and 7.41%, respectively. Compared with gas chromatography, the method has the advantages of no pretreatment of samples, high speed of analysis and the like.