描述
assay (cerimetric)…………………………………………98,0 – 105,0 %
assay (KMnO4)…………………………………………… min. 99,0 %
Identification iron…………………………………………. passes test
Identification sulfates…………………………………… passes test
insoluble matter……………………………………………max. 0,01 %
pH (5 %, H2O)……………………………………………. 3,0 – 4,0
chlorides (Cl)………………………………………………. max. 10 ppm
phosphates (as PO4)…………………………………… max. 10 ppm
total nitrogen (as N)…………………………………….. max. 0,001 %
arsenic (As)………………………………………………… max. 2 ppm
calcium (Ca)……………………………………………….. max. 10 ppm
chromium (Cr)…………………………………………….. max. 50 ppm
cobalt (Co)…………………………………………………. max. 25 ppm
copper (Cu)………………………………………………… max. 25 ppm
iron (III) (Fe (III))…………………………………………..max. 0,025 %
lead (Pb)……………………………………………………. max. 25 ppm
magnesium (Mg)…………………………………………. max. 20 ppm
manganese (Mn)…………………………………………. max. 0,05 %
nickel (Ni)…………………………………………………… max. 50 ppm
potassium (K)……………………………………………… max. 20 ppm
sodium (Na)……………………………………………….. max. 200 ppm
zinc (Zn)…………………………………………………….. max. 50 ppm
substances not precipitated by ammonium hydroxide max. 0,1 %
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