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本文是采用湿灰化后,用原子吸收法测定亚热带作物剑麻叶片中微量元素钙和镁。这方法比较简便,快速,重现性较好。一、实验部分 1.仪器和试剂 (1) WFX—1A型原子吸收分光光度计。 (2) 硝酸、硫酸、60％高氯酸,3％氯化镧溶液。 (3) 1000ppm钙标准溶液配制:准确称取已在110℃干燥过的优级纯CaCO_32.497克溶解于盐酸溶液中,赶走二氧化镁后,用去离子水准确地稀释到1升,盐酸浓度为1N。
In this paper, the determination of trace elements calcium and magnesium in sisal leaves of subtropical crops by atomic absorption spectrometry after wet ashing. This method is relatively simple, fast, reproducible. First, the experimental part 1. Instruments and reagents (1) WFX-1A atomic absorption spectrophotometer. (2) nitric acid, sulfuric acid, 60% perchloric acid, 3% lanthanum chloride solution. (3) Preparation of 1000ppm Calcium Standard Solution: Accurately weigh up to 32.497g of excellent grade pure CaCO_3 which has been dried at 110 ℃ and dissolve it in hydrochloric acid solution. After removing the magnesium dioxide, dilute to 1 liter with deionized water accurately, Hydrochloric acid concentration of 1N.