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Soil Analysis Filter Paper Grade 0790 Acid-washed paper with ash content of approximately 0.01%, low-magnesium, for the determination of trace elements (Mg, Mn, Co, Cu, Mo, B).
Grade 512 Low-phosphate papers approximately 1.5 ppm phosphate, for the filtration of calcium lactate extracts from soil samples for the determination of K and P according to Egnér, Riehm and Lederle.
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