【摘要】 研究了以磷酸增敏、硝酸钠惰性电解质、柠檬酸三钠抗干扰的新体系总离子强度调节混合液(TISAP)中测定低含量氟的新离子选择性电极方法。方法线性范围为1.00×10-2～1.00×10-7mol/L,检出限为1.9ng/mL。该方法操作简便,检出限降低,平衡响应时间缩短,测定结果准确。应用到矿泉水、牛奶、酒中的痕量氟的测定,结果满意。更多还原

【Abstract】 A ion-selective electrode method with a new TISAP solution in which phosphoric acid as a sensing reagent,sodium nitrate as inert electrolyte and sodium citric as anti-interference reagent for the determination of trace fluoride is developed.The linear range for the determination of fluoride is between 1.00×10-2～1.00×10-7 mol/L,and the detection limit is 1.9 ng/mL.The proposed method has been applied to the determination of trace fluoride in mineral-water,milk and wine with satisfactory results.更多还原