This Standard specifies the sampling method, sample preparation method, mois-
ture determination method, and particle size determination method to determine the
average qualities of chromium ores, manganese ores and ferruginous manganese ores
(hereafter referred to as "ores") of one lot.
NOTE : The International Standards corresponding to this Standard are as follows.
ISO 4296-1:1984 Manganese ores--Sampling---Part 1: Increment sam-
pling
ISO 4296-2:1983 Manganese ores--Sampling--Part 2: Preparation of
samples
ISO 4299:1989 Manganese ores--Determination of moisture content
ISO 6153 : 1989 Chromium ores--Increment sampling
ISO 6154:1989 Chromium ores--Preparation of samples
ISO 6230:1989 Manganese ores-~Determination of size distribution by
sieving
ISO 8530:1986 Manganese and chromium ores--Experimental methods
for checking the precision of sample division
ISO 8531:1986 Manganese and chromium ores---Experimental methods
for checking the precision of moisture determination
ISO 8541:1986 Manganese and chromium ores--Experimental methods
for checking the bias of sampling and sample preparation
ISO 8542:1986 Manganese and chromium ores--Experimental methods
for evaluation of quality variation and methods for checking the precision
of sampling
(Overall evaluation: MOD)