Download e-book for iPad: Food Chemicals Codex: Second Supplement to the Fourth by Institute of Me

By Institute of Me

ISBN-10: 0309068479

ISBN-13: 9780309068475

ISBN-10: 0585254885

ISBN-13: 9780585254883

The nutrition chemical compounds Codex is the accredited common for defining the standard and purity of foodstuff chemical substances. it really is usually referenced by means of the U.S. meals and Drug management and plenty of foreign foodstuff regulatory specialists. This moment complement to the Fourth version offers revisions and updates, experiences on adjustments in exams and assays, and comprises an errata part to either the 1st complement in addition to to the Fourth version. This complement additionally comprises 8 new and 34 revised monographs, new and revised basic analytical try out tools, and one new try answer. As within the First complement, every one monograph might be provided in its entirety with a boxed explanatory part previous it. The corrected or new sections of basic analytical exams also are awarded of their entirety. A extra particular desk of contents and the use of web page headers, besides different deliberate layout alterations, will make this article even more straightforward to take advantage of. The complement might be of curiosity to manufacturers and clients of nutrients chemical substances, together with processed-food brands, foodstuff technologists, quality controls chemists, study investigators, lecturers, scholars, and others fascinated about the technical features of foodstuff security.

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Example text

01 N hydrochloric acid as the blank, determine the absorbance of this solution and of a similar solution of FCC Disodium Inosinate Reference Standard, at a concentration of 20 µg/mL, in 1-cm cells with the maximum at about 250 nm. Calculate the quantity, in mg, of C10H11N4Na2O8P in the sample taken by the formula in which C is the exact concentration of the Reference Standard solution, in µg/mL; AU is the absorbance of the sample solution; and AS is the absorbance of the Reference Standard solution.

Use an additional 30 mL of acetone to facilitate transfer of the solids and to wash the filter cake, then dilute to volume with acetone, and mix. Prepare a series of standard solutions as follows: Transfer 100 mg of glycolic acid, previously dried in a desiccator at room temperature overnight and accurately weighed, into a 100-mL volumetric flask, dissolve in and dilute to volume with water, and mix. Use this solution within 30 days. 0 mL of the solution into separate 100-mL volumetric flasks, add sufficient water to each flask to make 5 mL, then add 5 mL of glacial acetic acid, and dilute to volume with acetone.

0 mL of the stock solution, dilute with water to volume, and mix. 0 (Test Solution C) µg/mL of sodium. 0 nm with a suitable atomic absorption spectrophotometer equipped with an airacetylene flame, using water as the blank. Plot the absorbance values of the Test Solutions versus their contents of sodium, in µg/mL, draw the straight line best fitting the three points, and extrapolate the line until it intercepts the concentration axis. From the intercept determine the amount, in µg, of sodium in each mL of Test Solution A.

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Food Chemicals Codex: Second Supplement to the Fourth Edition by Institute of Me

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