Excerpt:
A collaborative study of the internal standard isotope ratio method for measuring C-4 plant sugars in honey is reported. For 5 Youden pairs of samples containing 2-14% C-4 sugars, analyzed by 9
laboratories, mean Sr was 1.92% and SR was 2.19%. Improved performance parameters for determination of d13C in honey are also presented. The method was adopted first action by AOAC International.
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