CAJ | 학술논문

介绍了一种利用 X 射线荧光光谱法测定汽油中氯含量的方法。在管电压为25 kV、管电流为1．0 mA 的最佳实验条件下，氯质量分数在10～1000μg∕g 范围内与荧光强度呈良好的线性关系。主要考察石油醚与甲苯体积比为6∶4的混合物、异辛烷、市售氯标样3种基体对汽油中氯含量测定结果的影响，确定了最佳基体为异辛烷。对该方法进行了准确性和重复性考察，不同牌号汽油和氯形态样品测试结果的回收率均为95％～105％，方法的相对标准偏差小于4．2％。
개소료일충이용 X 사선형광광보법측정기유중록함량적방법。재관전압위25 kV、관전류위1．0 mA 적최가실험조건하，록질량분수재10～1000μg∕g 범위내여형광강도정량호적선성관계。주요고찰석유미여갑분체적비위6∶4적혼합물、이신완、시수록표양3충기체대기유중록함량측정결과적영향，학정료최가기체위이신완。대해방법진행료준학성화중복성고찰，불동패호기유화록형태양품측시결과적회수솔균위95％～105％，방법적상대표준편차소우4．2％。
A method for determining chlorine content in gasoline by X-ray fluorescence analysis is introduced. At the best conditions of 25 kV and 1.0 mA,the chloride concentration in the range of 10—1 000 μg∕g is linear with the fluorescence intensity. The influence of different substrates (mixture of pe-troleum ether and toluene (a volume ratio of 6∶4),isooctane and commercially available chlorine stand-ard sample)on the results of determination is studied,and their standard curves were established, respectively. It is found that the isooctane is the best substrate for the method. Precision and repeat-ability of the method were investigated. The effect of different gasoline and samples with different chlo-rine forms was invested. The results show that the recovery rate is between 95% and 105%,and the relative standard deviation is less than 4.2%.