Field experiments on the magnesium requi
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J. A. Birch; J. R. Devine; M. R. J. Holmes
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Article
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1966
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John Wiley and Sons
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English
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Absorbance was measured on a Unicam SP500 spectrophotometer. Chromatograms were repeated several times : the results are as follows : Extract Method 1 1 2 2 PC TLC PC TLC No. of chromatograms 5 5 4 4 Mean absorbance at 500mp 0.621 0.601 0.986 0,985 R.m.s. deviation 0.009 0.010 0.030 0.012 Coefficien