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由于掺混肥属于定向非随机不均匀物料,为使养分分析结果具有代表性,重现性好,提出掺混肥料取样方法的改进措施,选择可封闭式或关闭式采样探子;采用四角取样法进行取样;采用多次重新缩分的分样方式进行样品缩分;试样制备时保留至少200~250 g样品。用此方法对掺混肥取样分析,可获得较好的结果。
In order to make the results of nutrient analysis representative and good reproducibility, an improved measure of sampling method for blending fertilizers is proposed, and the sampling probe, which can be closed or closed, is selected. Because of the quadratic sampling method Samples were taken; sample fractionation was performed by multiple subdivision points; samples of at least 200-250 g were retained during sample preparation. With this method of mixed fertilizer sampling analysis, get better results.