AOAC OMB Final Action Recommendation (December 2019)-2016.14

2016.14 (October 2019) – FOS-03 METHOD

FOR ERP USE ONLY DO NOT DISTRIBUTE

= ( × 0.9) +

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= glucose concentration in Solution B (in µg/mL), C FB

= Fructose concentration in

where C GB

Solution B (in µg/mL), D = dilution factor between Solution A and Solution B (from Table

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2016.14C ), V A

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= total volume of Solution A (in mL), m A

= mass of sample weighed to prepare

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Solution A (in g), 0.0001 = factor to convert analyte concentration in solution (in µg/mL) to

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analyte concentration in sample (in g/100 g), 0.9 = factor to correct for uptake of water during

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fructan hydrolysis.

(d) For samples requiring the blank correction adapt the above equations as follows:

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= ( − 0 ) × × � � × 0.0001 = ( − 0 ) × × � � × 0.0001

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where C G0

= glucose concentration in Blank Solution B (in µg/mL), C F0

= Fructose concentration in

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Blank Solution B (in µg/mL).

(e) For samples requiring result in g/100 g original product (powder or liquid concentrate) that have

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been subjected to reconstitution as described in H(a) , adapt the above equations, as follows:

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= × × � � × � + � × 0.0001 = × × � � × � + � × 0.0001 = ( − 0 ) × × � � × � + � × 0.0001 = ( − 0 ) × × � � × � + � × 0.0001

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