67.220.20 – Food additives – PDF Standards Store ?u= Tue, 05 Nov 2024 23:51:38 +0000 en-US hourly 1 https://wordpress.org/?v=6.7.1 ?u=/wp-content/uploads/2024/11/cropped-icon-150x150.png 67.220.20 – Food additives – PDF Standards Store ?u= 32 32 ISO 7110:1985 ?u=/product/publishers/iso/iso-71101985/ Tue, 05 Nov 2024 23:51:38 +0000 Ammonium bicarbonate (Ammonium hydrogen- carbonate) for industrial use (including foodstuffs) — Determination of lead content — Flame atomic absorption method
Published By Publication Date Number of Pages
ISO 1985-07 5
]]> A test portion is dissolved in water and acidified with hydrochloric acid. The carbon dioxide is eliminated by heating the solution. The lead is complexed and extracted with a solution of diethylammonium diethyldithiocarbamate in xylene. The solution is aspirated into an acetylene-air flame. The absorption of the 217 nm line or, alternatively, of the 283.3 nm line emitted by a lead hollow-cathode lamp is measured. The method is applicable to products containing more than 0.1 mg/kg of lead.

]]> ISO 7100:1983 ?u=/product/publishers/iso/iso-71001983/ Tue, 05 Nov 2024 23:51:36 +0000 Phosphoric acid for industrial use (including foodstuffs) — Determination of vanadium content — Phosphotungsten vanadate spectrometric method
Published By Publication Date Number of Pages
ISO 1983-06 4
]]> 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.

]]> ISO 7099:1983 ?u=/product/publishers/iso/iso-70991983/ Tue, 05 Nov 2024 23:51:30 +0000 Phosphoric acid for industrial use (including foodstuffs) — Determination of hydrogen sulfide content — Titrimetric method
Published By Publication Date Number of Pages
ISO 1983-10 6
]]> The hydrogen sulphide in a test portion is removed in a stream of nitrogen and absorbed in a solution of sodiumhydroxide in aqueous acetone. the sulphide ions are titrated with standard volumetric mercury(II) acetate solution, in the presence of 1,5-diphenylthiocarbazone (dithizone) as indicator. The method is applicable to products having hydrogen sulfide contents greater than or equal to 0.05 mg/kg.

]]> ISO 5375:1979 ?u=/product/publishers/iso/iso-53751979/ Tue, 05 Nov 2024 23:29:44 +0000 Condensed phosphates for industrial use (including foodstuffs) — Determination of oxides of nitrogen content — 3,4- Xylenol spectrophotometric method
Published By Publication Date Number of Pages
ISO 1979-02 6
]]> Applicable to products having contents, expressed in nitrogen, of 2 mg/kg or more. Oxidation of nitrogen(III) of a test portion to nitrogen(V) by potassium permanganate. Reaction of nitrogen(V) with 3,4-xylenol under specified conditions to form a nitrate derivative. Distillation of the nitrate derivative and absorption in a sodium hydroxide solution. Spectrophotometric measurement of the yellow coloured nitrophenol at a wavelength of about 435 nm. Has also been approved by the IUPAC.

]]> ISO 5373:1981 ?u=/product/publishers/iso/iso-53731981/ Tue, 05 Nov 2024 23:29:44 +0000 Phosphates condensés à usage industriel (y compris les industries alimentaires) — Dosage du calcium — Méthode par spectrométrie d'absorption atomique dans la flamme
Published By Publication Date Number of Pages
ISO 1981-11 8
]]> La présente Norme internationale spécifie une méthode par spectrométrie d'absorption atomique dans la flamme, pour le dosage du calcium dans les phosphates condensés à usage industriel, y compris les industries alimentaires.

La méthode est applicable aux produits dont la teneur en calcium est supérieure ou égale à 50 mg/kg. La présence de silice (SiO2) soluble jusqu'à 5 µg/ml de solution d'essai n'interfère pas.

]]> ISO 5374:1978 ?u=/product/publishers/iso/iso-53741978/ Tue, 05 Nov 2024 23:29:44 +0000 Condensed phosphates for industrial use (including foodstuffs) — Determination of chloride content — Potentiometric method
Published By Publication Date Number of Pages
ISO 1978-12 6
]]> Applicable to products having contents expressed in chlorine equal to or more than 30 mg/kg. Potentiometric titration of the chloride ions with standard volumetric silver nitrate solution in a nitric acid-acetone-water medium, at a temperature below 20 0C, using a silver measurement electrode and a colomel reference electrode or a pair of silver-mercury(I) sulphate electrodes. Has also been approved by the IUPAC.

]]> ISO 5372:1978 ?u=/product/publishers/iso/iso-53721978/ Tue, 05 Nov 2024 23:29:43 +0000 Condensed phosphates for industrial use (including foodstuffs) — Determination of arsenic content — Silver diethyldithiocarbamate photometric method
Published By Publication Date Number of Pages
ISO 1978-08 4
]]> Applicable to products having As content equal or more than 0.2 mg/kg. Dissolution of a test portion, acidification with hydrochloric acid solution and oxidation with potassium bromide-bromate solution, followed by hydrolysis. Determination in accordance with the general method in ISO 2590, clause 3. Has also been approved by the IUPAC.

]]> ISO 3707:1976 ?u=/product/publishers/iso/iso-37071976/ Tue, 05 Nov 2024 23:09:39 +0000 Acide phosphorique à usage industriel (y compris les industries alimentaires) — Dosage du calcium — Méthode par absorption atomique dans la flamme
Published By Publication Date Number of Pages
ISO 1976-12 8
]]> La présente norme spécifie une méthode par absorption atomique dans la flamme pour le dosage du calcium dans l'acide phosphorique à usage industriel (y compris les industries alimentaires).

La méthode est applicable aux produits dont la teneur en calcium est supérieure à 50 mg/kg, mais, en exécutant une courbe d'étalonnage appropriée, on peut étendre le domaine d'application jusqu'à 10 mg/kg. La présence de SiO2 soluble jusqu'à 5 µg/ml de solution d'essai n'interfère pas.

]]> ISO 3709:1976 ?u=/product/publishers/iso/iso-37091976/ Tue, 05 Nov 2024 23:09:39 +0000 Phosphoric acid for industrial use (including foodstuffs) — Determination of oxides of nitrogen content — 3,4- Xylenol spectrophotometric method
Published By Publication Date Number of Pages
ISO 1976-11 6
]]> Applicable to products having a content, expressed as N, equal to or more than 0.2 mg/kg. Consists in oxidation of nitrous nitrogen to nitric nitrogen by potassium permanganate and reaction of nitrogen(V) with 3,4-xylenol under specified conditions to form a nitrate derivative. Subsequent destillation of the nitrate derivative and absorption in sodium hydroxide solution. Spectrophotometric measurement of the yellow nitrophenol at a wavelength of about 435 nm.

]]> ISO 3708:1976 ?u=/product/publishers/iso/iso-37081976/ Tue, 05 Nov 2024 23:09:39 +0000 Phosphoric acid for industrial use (including foodstuffs) — Determination of chloride content — Potentiometric method
Published By Publication Date Number of Pages
ISO 1976-11 6
]]> Applicable to products having Cl- contents, expressed as chlorine, equal to or more than 0.001 % (m/m). The lower limit can be extended downwards by using weaker standard reference and volumetric solutions. Describes potentiometric titration of the ions with silver nitrate solution in a nitric acid-acetone-water medium using a silver measurement electrode and a calomel reference electrode.

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