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Looking for measurement standards for total nitrogen, available phosphorus and potassium content of compound fertilizers!

2009-03-12View Original

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GB/T8572--2001 Determination of total nitrogen content in compound fertilizers by titration after distillation (neqISO5315:1984) GB/T8573-1999 Determination of available phosphorus content in compound fertilizers GB/'r8574---1988 Determination of potassium content in compound fertilizers by potassium tetraphenylborate gravimetric method

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