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当进行植物样品分析时,人们很少会想到植物组织中夹杂有土壤。这种情况导致了测定结果不符合实际浓度。本研究的植物样品取自弗吉尼亚州(VA)的Norfolk以及纽约州(NY)的Riverhead和Geneva三个地方的蔬菜试验田。收获时,用去离子水洗净植物样品,切成小块,用烘箱干燥(VA)和冷冻干燥(NY),粉碎使样品通过0.084cm的不锈钢筛网,然后保存在玻璃瓶中。同时取这三个地方0～15cm深的土壤作为土壤样品。通过感应耦合氩等离子体发射光谱测定法和电热原子吸收法分析土壤和植物样品中的若干无机元素。土壤和植物组织中的钛浓度被用作为衡量土壤夹杂物的标准。蔬菜样品中76%的铝,100%的铬,70%的铁是由于蔬菜生长期间其组织夹杂土壤颗粒所致。
When analyzing plant samples, it is rare for people to think of the soil in the plant tissue. This situation led to the results do not meet the actual concentration. The plant samples for this study were taken from vegetable plots in Norfolk, Virginia (VA) and at Riverhead and Geneva in New York (NY). At harvest, plant samples were washed with deionized water, cut into small pieces, oven-dried (VA) and freeze-dried (NY), pulverized to pass the sample through a 0.084 cm stainless steel mesh and then stored in glass vials. At the same time take the soil of 0 ~ 15cm deep in these three places as the soil sample. Several inorganic elements in soil and plant samples were analyzed by inductively coupled argon plasma emission spectrometry and electrothermal atomic absorption spectrometry. Titanium concentrations in soils and plant tissues are used as a measure of soil inclusions. 76% of the aluminum, 100% of the chromium and 70% of the iron in the vegetable samples are due to inclusions of soil particles in the tissue during vegetable growth.