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1 取样和制样存在的问题ZGB/T 18681995 (磷矿石 )、HG 2 740 95 (过磷酸钙 )、HG2 5 5 795 (钙镁磷肥 )等标准中 ,对取样与制样均有具体的规定。但有些厂对袋装磷肥不按标准中所列采样表或计算式随机选取包数抽样 ,而是任选若干包 ,以点代面的抽取 ,抽取的样品总量大大低于标
1 sampling and sample preparation ZGB / T 18681995 (phosphate rock), HG 2 740 95 (superphosphate), HG2 5 5 795 (calcium magnesium phosphate) and other standards, sampling and sample preparation are specific Provisions. However, some plants on the bagged phosphate fertilizer not according to the standard sampling table or formula selected randomly selected number of packages, but the optional number of packages, the point of surface extraction, the total sample size is significantly lower than the standard