Mercury-Free Raney Catalyst Method for Total Nitrogen in Fertilizers
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Abstract The original Raney catalyst powder method for total nitrogen was shown not to be applicable to nitric phosphates containing non-sulfate sulfur. Interference by the non-sulfate sulfur was eliminated by the addition of morin, a mordant dye, before the reduction. The method was modified further by omitting HgO, a possible pollutant, from the digestion and by shortening the digestion time. The modified method is highly rugged for a considerable range of fertilizer materials.
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1969 ◽
Vol 52
(1)
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pp. 23-30
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1975 ◽
Vol 58
(1)
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pp. 117-121
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