GB/T 19524. 1—2004 Determination of fecal coliforms in fertilizers
GB/T 19524.2—2004 Determination of Ascaris eggs mortality in fertilizers
Ny525-2012 organic fertilizer
NY/T 798—2004 Compound Microbial Fertilizer
NY 1 109—2006 General Technical Guidelines for Biological Safety of Microbial Fertilizers
Determination of Mercury, Arsenic, Cadmium, Lead and Chromium in NY/T 1978-20 10 Fertilizer
Hg/T 2843-1997 Standard titration solution, reagent solution and indicator solution commonly used in chemical analysis of fertilizer products.
Legal basis: national standard of bio-organic fertilizer in State Taxation Administration of The People's Republic of China, People's Republic of China (PRC).
4.4 The contents of arsenic, cadmium, lead, chromium and mercury in bio-organic fertilizer products shall comply with the provisions of 4.2.3 in NY/T 798—2004.
4.5 If inorganic nutrients are added to the product, the total nutrient content in the product shall be clearly indicated, which is expressed by the total amount (N P2O5 K2O).
5 sampling method
Every batch of products should be sampled and tested, and contamination by miscellaneous bacteria should be avoided during sampling.
5. 1 sampling tool
Prepare sterile plastic bags (bottles), metal spoons, scissors, samplers, sample sealing bags, seals and other tools in advance before sampling.
5.2 Sampling method and quantity
Sampling in the product library, using random method. Sampling is based on bags, and 5~ 10 bags are randomly selected. Under aseptic conditions, sample 200-300g from each bag, then mix all the samples evenly and divide them into three parts according to the quartering method, each part is not less than 500g.