| abstract |
The present invention relates to a method for producing a soil standard substance used for accuracy control, adjustment of measuring instruments, development of analytical methods, etc. in soil testing and analysis, and is extremely high on the order of several tens of percent without being restricted by the solubility of reagents. It is possible to manufacture a base material in which a concentration analysis target element is uniformly supported on a support material, and to arbitrarily produce a soil standard substance having a low concentration of 10 ppm or less and a high concentration of 1000 ppm or more based on the base material. An object of the present invention is to provide a method for producing a soil standard material that can be used and is extremely excellent in flexibility and productivity. A mixing process for obtaining a mixture by mixing one or more kinds of reagents containing an analysis target element with a support material, a heating process for heating the mixture to 100 to 1400 ° C. to obtain a heat-treated product, A base material preparation step of preparing a base material by pulverizing the heat-treated product. [Selection figure] None |