Fruit juice — Determination of soluble solids content — Pycnometric method
The method consists in measuring of the relative density of a test portion at 20 C using a pyknometer, and conversing, using a table, of the relative density sinto the soluble solids content expressed as sucrose. It is applicable to products containing no suspended matter and to clear concentrated products. For other fruit and vegetable products the method specified in ISO 2173 should be used.
Soaps — Determination of chloride content — Titrimetric method
The determination is carried out by argentometric titration after decomposition of a test and separation of fatty acids by filtration. The method is applicable to soaps having a chloride content, expressed as sodium chloride, equal to or greater than 0,1 % (m/m). It cannot be applied to componounded products.
Manganese ores and concentrates — Determination of calcium and magnesium contents — EDTA titrimetric...
The method is applicable to products having calcium and magnesium contents greater than 0,3 % (m/m). Should be read in conjunction with ISO 4297. Specifies principle, reagents, apparatus, sample, procedure and expression of results.
Chromium ores — Determination of calcium and magnesium contents — EDTA titrimetric method
The method is applicable to products having a calcium content greater than 0,1 % (m/m) and a magnesium content greater than 3,0 % (m/m). Should be read in conjunction with ISO 4297. Specifies principle, reagents, apparatus, procedure and expression of results.
This PDF includes GI #2 and Errata.
1. Scope and Introduction
1.1 This Standard is intended to cover the field of technical drawing practice. It applies primarily to end-product drawings, which usually consist of detail drawings, and assembly or subassembly drawings, but is not intended to fully cover other supplementary drawings such as check lists, schematic diagrams, electrical wiring…
Minimum Nutritional Testing, Labelling and Manufacturing Procedures for Pet
Foods
Applies to the nutrient content and adequacy of pet food for dogs
and cats, including relevant test procedures to maintain quality
control. The standard permits two methods of evaluation: complete
feeding studies and limited feeding studies with chemical
analysis.
Coffee — Determination of caffeine content (Reference method)
The method consists in extracting of the caffeine from a test portion, in an ammoniacal medium, successive purifying, with diethyl ether, on two chromatographic columns, the first in an alkaline medium, the second in an acid medium, followed by elution by chloroform. Spectrometric measurement of the eluate at the wavelength of maximum absorbance (in the ultraviolet region). A first figure shows…
Phosphoric acid for industrial use (including foodstuffs) — Determination of vanadium content — Phos...
A yellow complex is formed by reaction of the vanadium present in a test portion with phosphoric acid and sodium tungstate in acid medium. The spectrometric measurement of the absorbance is carried out at a wavelength of about 425 nm. The method is applicable to products having a vanadium content equal to or greater than 3 mg/kg.
