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Measurement sample towel cobalt (Co² +), manganese (Mn² +) or bromine (Br by X fluorescence spectrometry - ) content
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Adjust the instrument to the best measurement conditions according to the instrument manual
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Weigh cobalt acetate tetrahydrate , manganese acetate tetrahydrate , hydrobromic acid, and water according to the mass fraction ratio of each component in Table 2 , to the nearest 0.
Table 1 The ratio of the mass fraction of each component in the recommended working standard
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3 Sample analysis
Shake the sample well and filter it to 3/4 of the sample cup, cover it, and place it in the sample chamber of the instrument for testing.
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5 Result calculation
The mass fraction wi of cobalt (Co 2+ ), (Mn 2+ ) or bromine (Br-) content, expressed in %, calculated according to formula (4):
Where:
Yi—— The count rate of drill (Co 2+ ), manganese (Mn 2+ ) or bromine (Br-) in the sample, expressed in CPS;
Ai—— The intercept of the standard curve of cobalt (Ca 2+ ), manganese (Mn 2+ ) or bromine (Br-), expressed in CPS;
Ki—— The slope of the standard curve of cobalt (Co 2+ ), manganese (Mn 2+ ) or bromine (Br-), expressed in CPS/%,
The calculation result is expressed to two decimal places
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Take the arithmetic mean of the two parallel determination results as the determination result
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The absolute difference between the two parallel determination results is not more than 5% of the arithmetic mean of the two determination values
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