TBP-煤油体系中痕量DBP和MBP的气相色谱测定

GAS CHROMOTOGRAPHIC DETERMINATION OF TRACE AMOUNTS OF DBP AND MBP IN THE TBP-KEROSENE SYSTEM

摘要: 本文应用自制的一个新型碱金属离子化鉴定器测定30％TBP-煤油体系中的微量DBP和MBP;给出了两个程序:①1×10~(-5)M-5×10~(-4)M范围内的DBP和MBP的直接测定,特点是不用任何分离步骤。考查了干扰物质的影响,提出了一个三次注射定量法,能够消除TBP前未知干扰峰的干扰。②TBP-煤油溶液中痕量DBP和MBP的分离测定,特点是灵敏度高,比以前的方法高约两个数量级,可以测定2×10~(-7)M—1×10~(-5)M范围内的DBP和MBP样品。给出了分离的条件试验和结果。此外,本文略述了所试制的新型碱金属离子化鉴定器的操作,并给出了一个简化的甲基化程序。

Abstract: Using a new type of alkali flame ionization detector (AFID) for the determination of trace amounts of DBF and MBP in the system of 30% -kerosene, two procedures are given:(1) Direct determination of DBF and MBP: in the range of 1X10~B to 5×10-4M. The effect of interfering materials has been investigated. A quan-tatitive method of "three sample injections" is proposed to eleminate the interference of unknown peak (2) The separate determination of trace amounts, of DBP and MBP can be measured, in the range 2×10-7 to 1×10-6M.The separation conditions and results are given. The operation of AFID is described, and a simplified methylating procedure is presented.

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