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METHOD FOR RAPIDLY MEASURING EXCHANGEABLE CALCIUM AMOUNT OF SOIL BY USING SPECTROPHOTOMETER
METHOD FOR RAPIDLY MEASURING EXCHANGEABLE CALCIUM AMOUNT OF SOIL BY USING SPECTROPHOTOMETER
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机译:分光光度法快速测定土壤中可交换钙的方法
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摘要
PURPOSE: A method for rapidly measuring exchangeable calcium amount of soil is provided to achieve improved convenience and promptness, while eliminating the danger of explosion. CONSTITUTION: A method comprises a first step of precipitating exchangeable calcium contained in a soil by using an ammonium acetate solution; a second step of adding mixture of ethanol-distilled water to the precipitation; a third step of making the solution alkaline by adding sodium hydroxide-sodium carbonate buffer solution; a fourth step of adding a mixture coloring agent and mixing the resultant solution; and a fifth of defining exchangeable calcium amount by measuring light absorbance through the use of a spectrophotometer.
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