| 摘要 |
A standard sample composition containing a complexing agent and an alkali salt, mixed with a known amount of a foodstuff, the content of at least one component of which is accurately known. The mixture is dissolved in a solvent, e.g. water, and comminuted to form a dispersion. The solvent is removed e.g. by freeze-drying or other suitable method, such that the water content of the composition is <5% by weight, preferably <1% by weight, more preferably <0.1%, most preferably <0.01% by weight of the total composition.
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