CAJ | 학술논문

采用石墨炉-原子吸收光谱法测定煤矸石土种植的三种粮食中镉元素含量。试验结果表明,加入40μg.mL-1硝酸铵作为基体改进剂时,镉元素灰化损失减小。仪器检出限可达到0.147 ng.mL-1,该方法精密度RSD为3.10%。在最佳测定条件下,粮食样品加标回收率为95.50%～101.32%之间。该方法简便准确,用该法测定矸石土种植粮食中镉含量获得满意结果。
채용석묵로-원자흡수광보법측정매안석토충식적삼충양식중력원소함량。시험결과표명,가입40μg.mL-1초산안작위기체개진제시,력원소회화손실감소。의기검출한가체도0.147 ng.mL-1,해방법정밀도RSD위3.10%。재최가측정조건하,양식양품가표회수솔위95.50%～101.32%지간。해방법간편준학,용해법측정안석토충식양식중력함량획득만의결과。
In this paper,a method for determination of cadmium in three grains raise in coal gangue is introduced by graphite furnace atomic absorption spectrometry（GFAAS）.It is found that ammonium mitrate is more suitable for matrix modifier than ammonium dihydrogen phosphate which significantly increases the sensitivity of the method.The detection limit could reach a low level of 0.147 ng·mL-1.Under the optimum experimental conditions,the average recovery is 100.6% and the relative standard deviation is 5.5 %（n=6）.The established method is simple,rapid and accurate.It is applied to the determination of cadmium in grains,and satisfactory results are achieved.