紫外分光光度计测定香豆素改性脂肪族异氰酸酯的转化率

Measurement of conversion rate of coumarin modified aliphatic isocyanates using UV spectrophotometer

自合成4-羟甲基香豆素改性的脂肪族异氰酸酯样品,利用紫外分光光度计测试4-羟甲基香豆素改性脂肪族异氰酸酯的转化率,线性范围0~25 mg/L,在此范围内R^(2)=0.9995,方法检出限为0.14 mg/L。在低、高、中3种加标水平下,平均加标回收率为95.0%,相对标准偏差为1.4%,表明此方法准确、简便。

The conversion rate of 4-hydroxymethylcoumarin modified aliphatic isocyanates was tested using UV spectrophotometer,with linear range of 0-25 mg/L and R^(2)=0.9995 within this range.The detection limit of the method was 0.14 mg/L.At three spiking levels of low,high,and medium,the average recovery rate was 95.0%,with relative standard deviation of 1.4%,indicating that this method was accurate and simple.