Standard sample composition and manufacture thereof

Details Standard sample composition and manufacture thereof Standard sample composition and manufacture thereof

2007-06-12

2007-06-12

Wallenhorst, Maureen M. (Department: 1743)

Chemistry: analytical and immunological testing

Composition for standardization, calibration, simulation,...

C436S019000, C436S020000, C436S021000, C436S174000

Reexamination Certificate

active

10130713

ABSTRACT:
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.

REFERENCES:
patent: 3573062 (1971-03-01), Paynter et al.
patent: H35 (1986-03-01), Berkowitz
patent: 0 962 768 (1999-12-01), None
patent: WO 81/02467 (1981-09-01), None
W. Ooghe et al., “Comparison of Some Additivies Used in the Preparation of Freeze-Dried Lemon Juice Candidate Reference Materials,”Fresenius' J. Anal. Chem., V. 360(3-4), 1998, abstract.

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