水产品中氟化物的离子色谱法

Determination of the fluorine in fish or fishfood products with the ion chromatography

本文提出用离子色谱检测水产品中的氟化物。样品经过600℃灰化，酸性下蒸馏后，用碱液吸收上机。采用阴离子柱分离，电导检测。流动相为Na2CO3／NaHCO3=6mM/1mM。50μL进样，检测限可达0．05mg／kg。线形范围为，0．05～5×10^3mg／kg。方法的回收率为86～93％。方法有选择性好，灵敏度高的优点。

In this article, an ion chromatography method with the conductivity detector for determination of fluorine in fishes or fish products is studied. The sample is ashed at 600℃, distilled and absorbed with sodium hydroxide . Then the analyte is separated in the anion exchange column and detected with the conductivity decector. The mobile phase is Na2CO3/NaH- CO3 =6mM/1mM. The linearity ranges from 0.05 ～5 × 10^3mg/kg . The detection limit is 0.05mg/kg with 50μL injection volumn, and the recovery rate are 86 ～93%. This method is characterized by high specificity and sensitivity .