CAJ | 학술논문

采用微波等离子体原子发射光谱法测定水溶液中金属元素铝，方法的线性范围为0．01～70μg／L，线性相关系数（ R）为0．9998，检出限为0．335μg／L，检测上限为70 mg／L，[ H＋]浓度低于2 mol／L时，酸度和酸介质对发射强度无显著影响，P酸度＝0．188，P酸介质＝0．139，均大于α（0．05），且具有较高的精密度和准确度。采用所建立的微波等离子体原子发射光谱法（ MP－AES法）测定森林土壤中浸提性铝和全铝的质量分数，分别与LY／T 1257—1999和LY／T 1253—1999中氟化钾取代EDTA容量法相比较，测定结果无显著性差异，P＝0．879和P＝0．911，均大于α（0．05）；同时对测定的土壤中全铝质量分数进行加标回收检验，回收率在99％～104％。 MP－AES法可直接使用空气作为工作气体，其安全性高，成本低，条件容易满足。因此，所建立的方法能够满足森林土壤中铝的测定。
채용미파등리자체원자발사광보법측정수용액중금속원소려，방법적선성범위위0．01～70μg／L，선성상관계수（ R）위0．9998，검출한위0．335μg／L，검측상한위70 mg／L，[ H＋]농도저우2 mol／L시，산도화산개질대발사강도무현저영향，P산도＝0．188，P산개질＝0．139，균대우α（0．05），차구유교고적정밀도화준학도。채용소건립적미파등리자체원자발사광보법（ MP－AES법）측정삼림토양중침제성려화전려적질량분수，분별여LY／T 1257—1999화LY／T 1253—1999중불화갑취대EDTA용량법상비교，측정결과무현저성차이，P＝0．879화P＝0．911，균대우α（0．05）；동시대측정적토양중전려질량분수진행가표회수검험，회수솔재99％～104％。 MP－AES법가직접사용공기작위공작기체，기안전성고，성본저，조건용역만족。인차，소건립적방법능구만족삼림토양중려적측정。
We measured the Al content in aqueous solution using microwave plasma atomic emission spectrometry ( MP-AES) , which was with the linearity range of 0.01-70μg/L, good precision and accuracy, the linear correlation coefficients for MP-AES established in aqueous solution of 0.999 8, a detection limit of 0.335μg/L and the detection limits of 70 mg/L. The acidity and acid medium had no significant effect on the emission intensity when [ H+] concentration was lower than 2 mol/L.The content of leaching of Al and full Al were determined by MP-AES established in aqueous solution.Based on the results obtained by method of KF-EDTA in LY/T 1257-1999 and LY/T 1253-1999, MP-AES had no significant differ-ence with the standard method ( KF-EDTA) , and the spiked recoveries in determination of full Al content were in 99%-104%.MP-AES directly using air as the working gas, not only improves the safety, but also saves the operating costs, therefore, it is a feasible method for determining Al in forest soil.