71.060.40 碱 标准查询与下载

ISO 995:1975 工业用氢氧化钾.二氧化硅含量的测定.还原硅钼酸盐光度法

Potassium hydroxide for industrial use; Determination of silica content; Reduced molybdosilicate photometric method

ISO 3194:1975 工业用氢氧化钾.硫化合物量的测定.还原和滴定法

Potassium hydroxide for industrial use; Determination of sulphur compounds; Method by reduction and titrimetry

ISO 3198:1975 工业用氢氧化钠.硫化含物含量的测定.还原和滴定法

Sodium hydroxide for industrial use; Determination of sulphur compounds; Method by reduction and titrimetry

ARMY OO-T-1719 A-1975 工业束和扎口机器

This specification covers tying machines for tying bundles.

TYING MACHINES, BUNDLE, INDUSTRIAL

CNS 2236-1975 压缩氢气（工业级）

本标准适用于工业用氢气。

Compressed Hydrogen (Technical Grade)

ISO 3196:1975 工业用氢氧化钠 碳酸盐含量的测定 滴定法

Applicable to products having contents, expressed as CO2 , of more than 0.01 % (m/m). Relates to a procduct containing neither sulphides nor chlorates or only sulphides or only chlorates. Preliminary test by boiling an acidified test sample in the presence of methyl orange and with a lead acetate paper strip in the vapour. The sulphides blacken the paper and chlorates delolourize the methyl orange. Products containing neither sulphides nor chlorates: liberation of carbon dioxide by acidification and heating. Entrainment in a flow of gas and absorption in an excess of barium hydroxide solution. Titration of the excess barium hydroxide solution with a standard volumetric hydrochloric acid solution in the presence of thymolphthalein as indicator.

Sodium hydroxide for industrial use; Determination of carbonates content; Titrimetric method

ISO 3195:1975 工业用氢氧化钠 取样 试样 供某些测定用的主要溶液的配制

Indicates the conditions under which the test sample shall be prepared and relates to particular properties which require particular precausions: the samples shall be taken rapidly in a dry atmosphere, storage in an airtight bottle. The bottle shall be made from an inert material such as polyethylene. Preparation of the main solution with distilled carbonat- free water. If the silica content is to be determined the test portion shall be dissolved in a container made from silica-free material such as polyethylene or silver. Cancels and replaces ISO Recommendations R 977/1969 and R 978/1969.

Sodium hydroxide for industrial use; Sampling; Test Sample; Preparation of the main solution for carrying out certain determinations

ISO 3177:1975 工业用氢氧化钾.氯化物量的测定.光度法

Potassium hydroxide for industrial use; Determination of chlorides content; Photometric method

ISO 3197:1975 工业用氢氧化钠.氯化物含量的测定.光度法

Sodium hydroxide for industrial use; Determination of chlorides content; Photometric method

ISO 992:1975 工业用氢氧化钾 氯化物含量的测定 汞量法

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.

Potassium hydroxide for industrial use; Determination of chlorides content; Mercurimetric method

GOST 10689-1975 取自霞石原料供工业使用的纯碱.规范

Настоящий стандарт распространяется на техническую кальцинированную соду из нефелинового сырья, предназначенную для цветной металлурги

Soda ash from nepheline raw stock for industrial use. Specifications

ISO 983:1974 工业用氢氧化钠.铁含量的测定.1,10-菲罗啉光度法

Sodium hydroxide for industrial use; Determination of iron content; 1,10- Phenanthroline photometric method

ISO 979:1974 工业用氢氧化钠 试验方法

Method for determination of the titre; this is expressed conventionally as percentages by mass of NaOH, a) as total alkalinity and b) as caustic alkalinity, corresponding to the total alkalinity less the alkalinity due to carbonates. 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 two amounts a) and b). The mass of carbon dioxide is determined by the method specified in ISO 3196. This method has also been approved by the IUPAC. - Cancels and replaces ISO Recommendation R 979-1969 of which it constitutes a technical revision.

Sodium hydroxide for industrial use; Method of assay

ISO 984:1974 工业用氢氧化钠.二氧化硅含量的测定.还原硅钼络合物光度法

Sodium hydroxide for industrial use; Determination of silica content; Reduced silico-molybdic complex photometric method

ISO 1550:1973 工业用氢氧化钾 钠含量的测定 火焰发射分光光度法

The method is applicable to products having sodium contents greater than 0.01 % (m/m). The principle consists in the dissolution of a test portion, followed by acidification to ph value 1. Atomization of the obtained solution in the burner of a flame spectrophotometer. Measurement of the intensity of the radiation emitted at 589 nm; comparison with the intensity obtained for standard sodium chloride solutions, the acidity and potassium chloride content of which are equivalent to that of the test solution. - Cancels and replaces ISO Recommendation R 1550-1970.

Potassium hydroxide for industrial use; Determination of sodium content; Flame emission spectrophotometric method

ISO 2900:1973 工业用氢氧化钾 二氧化碳含量的测定 滴定法

Applicable to products having CO2 contents of more than 0.01 % (m/m). Three cases are envisaged. The product containing neither sulphides nor chlorates or containing sulphides or chlorates. The principle in presence of neither sulphides nor chlorates consists in liberation of carbon dioxide in a flow of gas and absorption in an excess of standard volumetric barium hydroxide solution. Titration of the excess with standard volumetric hydrochloric acid solution in the presence of thymolphthalein as indicator. In presence of sulphides, pretreatment by oxidation of the sulphides by hydrogen peroxide and boiling, in presence of chlorates, pretreatment by reduction of the chlorates to chlorides by the addition of iron(II) sulphate.

Potassium hydroxide for industrial use; Determination of carbon dioxide content; Titrimetric method

ISO 994:1973 工业用氢氧化钾.铁含量的测定.1,10-菲罗啉光度法

Potassium hydroxide for industrial use; Determination of iron content; 1,10- Phenanthroline photometric method

ISO 2466:1973 工业用氢氧化钾 取样 试样 供某些测定用的主溶液的配制

Provides certain indications relating to the sampling and indicates the conditions under which the test sample should be prepared The special properties which make particular precautions essential such as hygroscopic characteristics, absorption of carbon dioxide, corrosive action on containers, should be stressed. The preparation of the main solution is carried out by dissolution of the test portion in distillated water or by transfer of the liquid test portion directly and quantitatively in a one-mark volumetric flask. Cancels and replaces ISO Recommendation R 988-1969 and ISO recommendation R 989-1969.

Potassium hydroxide for industrial use; Sampling; Test sample; Preparation of the main solution for carrying out certain determinations

ISO 990:1973 工业用氢氧化钾 试验方法

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.

Potassium hydroxide for industrial use; Method of assay

ISO 981:1973 工业用氢氧化钠 氯化物含量的测定 汞量法

The method is applicable to products of which the chloride content is greater than 0.005 % (m/m). The procedure based on titration of the chloride ions with mercury(II) nitrate in the presence of diphenylcarbazone as indicator. - Replaces ISO Recommendation R 981-1969.

Sodium hydroxide for industrial use; Determination of chloride content; Mercurimetric method