?u= Wed, 06 Nov 2024 05:20:17 +0000 en-US hourly 1 https://wordpress.org/?v=6.7.1 ?u=/wp-content/uploads/2024/11/cropped-icon-150x150.png ?u= 32 32 ?u=/product/publishers/tappi/tappi-tip-0607-212002/ Wed, 06 Nov 2024 05:20:17 +0000 Boiling Point Rise of Spent Sulfite Liquors

Published By	Publication Date	Number of Pages
TAPPI	2002	2

]]> This Technical Information Paper resents the increase in boiling point of a variety of sulfite liquors and wood species as a function of the total solids concentration in the spent liquor.

]]> ?u=/product/publishers/jis/jis-k-14171961/ Wed, 06 Nov 2024 02:30:15 +0000 Barium Hydroxide

Published By	Publication Date	Number of Pages
JIS	1961-09-01	7

]]> Barium Hydroxide

Published By	Publication Date	Number of Pages
JIS	1961-09-01	7

]]> ?u=/product/publishers/iso/iso-9971976/ Wed, 06 Nov 2024 00:32:20 +0000 Potassium hydroxide for industrial use — Determination of calcium content — EDTA (disodium salt) complexometric method

Published By	Publication Date	Number of Pages
ISO	1976-05	5

]]> The method is applicable to products having a calcium content equal to or greater than 0.002 % (m/m). The principle consists in titration of the calcium with a standard volumetric solution of the disodium salt of (ethylenedinitrilo)tetraacetic acid (EDTA disodium salt) in the presence of 2,2'-(ethylenedinitrilo)diphenol Äglyoxal-bis-(2-hydroxyanil)Ü as indicator, after elimination of impurities which may hinder the determination. – Replaces ISO Recommendation R 997-1969.

]]> ?u=/product/publishers/iso/iso-9951975/ Wed, 06 Nov 2024 00:32:05 +0000 Potassium hydroxide for industrial use — Determination of silica content — Reduced molybdosilicate photometric method

Published By	Publication Date	Number of Pages
ISO	1975-09	5

]]> The method is applicable to products having silica contents exceeding 10 mg/kg. The principle is based on the formation of yellow oxidized silico-molybdic complex in a strongly acid medium, in the presence of boric acid to suppress interference by fluorides. Selective reduction of this complex with a mixture of aminonaphtholsulphonic acid (4-amino-3-hydroxynaphthalene-1-sulphonic acid), sodium metabisulphite and sodium sulphite, in the presence of oxalic acid and in a strongly acid medium so as to suppress interference by phosphates. Photometric measurement of the blue-coloured complex at a wavelength of about 795 nm.

]]> ?u=/product/publishers/iso/iso-9941973/ Wed, 06 Nov 2024 00:31:55 +0000 Potassium hydroxide for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method

Published By	Publication Date	Number of Pages
ISO	1973-04	4

]]> Describes a method that is more sensitive and more widely used than the 2,2'-bipyridyl method. It is applicable to products having iron contents equal to or greater than 0.3 mg/kg. The principle is based on the reduction of iron(III) by hydroxylammonium chloride, formation of a iron(II)/1,10-phenanthroline complex in a buffered system. Photometric measurement of the coloured complex at a wavelength of about 510 nm. – Cancels and replaces ISO Recommendation R 994-1969.

]]> ?u=/product/publishers/iso/iso-9921975/ Wed, 06 Nov 2024 00:31:39 +0000 Potassium hydroxide for industrial use — Determination of chlorides content — Mercurimetric method

Published By	Publication Date	Number of Pages
ISO	1975-02	4

]]> The method is applicable to products the chloride content of which is greater than 25 mg/kg. The procedure is based on titration of the chloride ions with mercury(II) nitrate in the presence of diphenylcarbazone as indicator. – Replaces ISO Recommendation R 992-1969.

]]> ?u=/product/publishers/iso/iso-9901973/ Wed, 06 Nov 2024 00:31:17 +0000 Potassium hydroxide for industrial use — Method of assay

Published By	Publication Date	Number of Pages
ISO	1973-04	4

]]> Method for determination of the titre, conventionally expressed as percentages by mass of KOH. There are three ways: a) total alkalinity, b) caustic alkalinity corresponding to the total alkalinity less the alkalinity due to carbonates and c) actual potassium hydroxide corresponding to the total alkalinity less the alkalinity due to carbonates and any hydroxide which may be present. The principle consists in titration of the total alkalinity with standard volumetric hydrochloric acid solution in the presence of methyl orange as indicator. Calculation of the three amounts a), b), and c). – Replaces ISO Recommendation R 990-1969.

]]> ?u=/product/publishers/iso/iso-9861976/ Wed, 06 Nov 2024 00:30:48 +0000 Sodium hydroxide for industrial use — Determination of calcium content — EDTA (disodium salt) complexometric method

Published By	Publication Date	Number of Pages
ISO	1976-05	5

]]> The method is applicable to products having a calcium content equal to or greater than 0.002 % (m/m). The principle consists in titration of the calcium with a standard volumetric solution of the disodium salt of (ethylenedinitrilo)tetraacetic acid (EDTA disodium salt) in the presence of 2,2'-(ethylenedinitrilo)diphenol Äglyoxal-bis-(2-hydroxyanil)Ü as indicator, after elimination of impurities which may hinder the determination. – Replaces ISO Recommendation R 986-1969.

]]> ?u=/product/publishers/iso/iso-9841974/ Wed, 06 Nov 2024 00:30:35 +0000 Sodium hydroxide for industrial use — Determination of silica content — Reduced silico-molybdic complex photometric method

Published By	Publication Date	Number of Pages
ISO	1974-12	5

]]> The method is applicable to products having silica contents exceeding 10 mg/kg. The principle is based on the formation of yellow oxidized silico-molybdic complex in a strongly acid medium, in the presence of boric acid to suppress interference by fluorides. Selective reduction of this complex with a mixture of aminonaphtholsulphonic acid (4-amino-3-hydroxynaphthalene-1-sulphonic acid), sodium metabisulphite and sodium sulphite, in the presence of oxalic acid and in a strongly acid medium so as to suppress interference by phosphates. Photometric measurement of the blue-coloured complex at a wavelength of about 795 nm.

]]> ?u=/product/publishers/iso/iso-9831974/ Wed, 06 Nov 2024 00:30:28 +0000 Sodium hydroxide for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method

Published By	Publication Date	Number of Pages
ISO	1974-12	4

]]> Specifies a method that is more sensitive and more widely used than the 2,2'-bipyridyl method. It is applicable to products having iron contents equal to or greater than 0.5 mg/kg. The principle is based on the reduction of trivalent iron by hydroxylammonium chloride, formation of a bivalent iron/1,10-phenanthroline complex in a buffered system. Photometric measurement of the coloured complex at a wavelength of about 510 nm. This method has also been approved by the IUPAC. – Cancels and replaces ISO Recommendation R 983-1969.

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