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提出了用 FIA- ISE联用技术测定水的 p H值的方法。以 0 .5mol/L KNO3和 1 .0× 1 0 - 7mol/L Na H2 PO4作载液 ,在 p H 3.7～ 1 1 .7范围内有良好的线性关系 ,用于实际试样分析 ,结果良好。分析速度可高达每小时 1 50～2 0 0个试样 ,相对标准偏差为 0 .58%～ 2 .0 %。
A method for determining the p H value of water using the FIA-ISE technique was proposed. With 0.5 mol / L KNO3 and 1 × 10 7 mol / L Na H2 PO4 as carrier liquid, there is a good linear relationship in the range of 3.7 ~ 1.1 1.7 for the actual sample analysis. The results good. Analytical speed can be as high as 1 50 ~ 200 samples per hour, the relative standard deviation of 0.58% ~ 2.0%.