CAJ | 학술논문

建立了测定海水中总铬的石墨炉原子吸收光谱法。利用抗坏血酸作为基体改进剂，针对灰化温度、灰化时间、原子化温度、基体改进剂加入量4种因素，利用正交试验优化了石墨炉原子吸收光谱法测定海水中总铬的实验条件。结果表明：原子化温度对测试过程的影响最大，正交试验的最优测试条件：灰化温度1300℃，灰化时间20 s，原子化温度2400℃，抗坏血酸质量分数为5%。在优化条件下，校正曲线的相关系数为0.9998，测定结果的相对标准偏差为3.80%（n=12），样品加标回收率在98.2%～109.2%之间。该法适用于测试大洋海水中的总铬含量。
건립료측정해수중총락적석묵로원자흡수광보법。이용항배혈산작위기체개진제，침대회화온도、회화시간、원자화온도、기체개진제가입량4충인소，이용정교시험우화료석묵로원자흡수광보법측정해수중총락적실험조건。결과표명：원자화온도대측시과정적영향최대，정교시험적최우측시조건：회화온도1300℃，회화시간20 s，원자화온도2400℃，항배혈산질량분수위5%。재우화조건하，교정곡선적상관계수위0.9998，측정결과적상대표준편차위3.80%（n=12），양품가표회수솔재98.2%～109.2%지간。해법괄용우측시대양해수중적총락함량。
Ascorbic acid being used as matrix modifier, four facts being optimized by orthogonal test including ashing temperature, ashing time, atomic temperature and quantity of ascorbic acid, a direct determination of total Cr in seawater by GFAAS was set up. The result showed that atomic temperature was the main factor to influence the test. The optimized test conditions were as the follow: ashing temperature was 1 300℃, ashing time was 20 s, atomic temperature was 2 400℃, and ascorbic acid mass fraction was 5%. The linearity correlation coefficient of the calibration curve was 0.999 8, the relative standard deviationof the results was 3.80%(n=12), and the recovery of samples distribute was in the range of 98.2%–109.2%. The method can be used to determine Cr in seawater accurately.