Quality control substances of nitrogen, phosphorus and potassium in citrus leaves
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Quality control substances of nitrogen, phosphorus and potassium in spinach
RMT005 | 70g/瓶
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Quality control substances of nitrogen, phosphorus and potassium in soil
RMU180 | 70g/瓶
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Quality control substances of nitrogen, phosphorus and potassium in municipal sludge
RMU171 | 50g/瓶
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Quality control substances of nitrogen, phosphorus and potassium in municipal sludge
RMU170 | 50g/瓶
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Quality control substances of nitrogen, phosphorus and potassium in pine needles
RMT006 | 70g/瓶
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Quality control substances of nitrogen, phosphorus and potassium in municipal solid waste
RMU173 | 50g/瓶
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Quality control substance of nitrogen, phosphorus and potassium in organic-inorganic compound fertilizer
RMK024 | 70g/瓶
Quality control substances of nitrogen, phosphorus and potassium in citrus leaves
NY/T2419-2013、NY/T2017-2011、NY/T2420-2013、NY/T2421-2013
总氮(N)采用硫酸-过氧化氢消煮,碱化后蒸馏滴定法;总磷(P)采用硫酸-过氧化氢消煮,等离子体发射光谱法(ICP-OES)、紫外分光光度法(UV);总钾(K)采用硫酸-过氧化氢消煮,等离子体发射光谱法(ICP-OES)、火焰原子吸光谱法(FAAS)、火焰光度计.
氮(N)
20.3
1.4
g/kg
磷(P)
1.22
0.09
g/kg
钾(K)
6.98
0.45
g/kg
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