Improvement of Sample Pretreatment Method for Determination of Available Silicon in Soil
In order to clarify the treatment conditions for the preparation of the test solution of the effective silicon detection method,so as to a-chieve the same extraction conditions of each sample,and to ensure the accuracy and precision of the data,the sample pretreatment of detection method was explored and studied.The viscous yellow soil was used for pre-test,the constant temperature oscillator was used to screen the better extraction speed and time,and then the accuracy and precision were investigated with reference materials.Three groups of better treatments were screened out in the pre-test,which were 180 r/min-3 min,200 r/min-1 min and 200 r/min-3 min respectively.After the three treatments were verified with standard materials,the leaching amount of effective silicon in 200 r/min-3 min treatment was the largest,the accuracy met the requirements and the precision was higher.The preparation of the test solution for the detection of available silicon in soil can be prepared by using a constant temperature oscillator instead of the incubator for 5 hours and oscillating for 3 minutes at 200r/min rotational speed every other hour,so that the samples to be tested can be extracted under the same conditions.it is also suitable for soils with heavy viscosity.
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