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Número de resultados: 160
UNE-EN 12125:2022 UNE
Estado: Vigente / 2022-12-21
Productos químicos utilizados en el tratamiento del agua destinada al consumo humano. Tiosulfato de sodio.
CTN 77/SC 1 Agua
UNE 30219:1978 UNE
Estado: Vigente / 1978-01-15
Nitrato amónico para uso industrial. Determinación de la acidez libre. Método volumétrico.
CTN 30 Industria química inorgánica
UNE 30218:1976 UNE
Estado: Vigente / 1976-10-15
Nitrato amónico para uso industrial. Determinacional del pH. Método potenciométrico.
UNE 30217:1968 UNE
Estado: Vigente / 1968-11-15
Sulfato amónico técnico.
UNE 30210:1968 UNE
Análisis químico del carbonato sódico técnico.
UNE 30044:1954 UNE
Estado: Vigente / 1954-11-15
Sulfato ferroso técnico, características y ensayos.
ISO/TR 4277:2009 ISO
Estado: Published / 2009-10-21
Cryolite, natural and artificial — Conventional test for evaluation of free fluorides content
ISO 20292:2009 ISO
Estado: Published / 2009-04-29
Materials for the production of primary aluminium — Dense refractory bricks — Determination of cryolite resistance
ISO 6374:1981 ISO
Estado: Published / 1981-10-01
Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of phosphorus content — Atomic absorption spectrometric method after extraction
ISO 5938:1979 ISO
Estado: Published / 1979-07-01
Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of sulphur content — X-ray fluorescence spectrometric method
ISO 5444:1978 ISO
Estado: Published / 1978-11-01
Sodium fluorosilicate for industrial use — Determination of loss in mass at 105 degrees C
ISO 5440:1978 ISO
Estado: Published / 1978-10-01
Sodium hexafluorosilicate for industrial use — Determination of phosphate content — Molybdovanadate spectrophotometric method
ISO 4280:1977 ISO
Estado: Published / 1977-11-01
Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of sulphate content — Barium sulphate gravimetric method
ISO 4281:1977 ISO
Estado: Published / 1977-03-01
Sodium hexafluorosilicate for industrial use — Determination of free acidity and total hexafluorosilicate content — Titrimetric method
ISO 1693:1976 ISO
Estado: Published / 1976-09-01
Cryolite, natural and artificial — Determination of fluorine content — Modified Willard-Winter method
ISO 1619:1976 ISO
Cryolite, natural and artificial — Preparation and storage of test samples
ISO 1620:1976 ISO
Cryolite, natural and artificial — Determination of silica content — Reduced molybdosilicate spectrophotometric method
ISO 1694:1976 ISO
Cryolite, natural and artificial — Determination of iron content — 1,10- Phenanthroline photometric method
ISO 3391:1976 ISO
Cryolite, natural and artificial — Determination of calcium content — Flame atomic absorption method
ISO 3393:1976 ISO
Estado: Published / 1976-08-01
Cryolite, natural and artificial, and aluminium fluoride for industrial use — Determination of moisture content — Gravimetric method
ISO 3360:1976 ISO
Phosphoric acid and sodium phosphates for industrial use (including foodstuffs) — Determination of fluorine content — Alizarin complexone and lanthanum nitrate photometric method
ISO 1691:1976 ISO
Estado: Published / 1976-07-01
Sodium and potassium silicates for industrial use — Determination of carbonates content — Gas-volumetric method
ISO 1692:1976 ISO
Estado: Published / 1976-04-01
Sodium and potassium silicates for industrial use — Determination of total alkalinity — Titrimetric method
ISO 739:1976 ISO
Estado: Published / 1976-02-01
Sodium carbonate for industrial use — Preparation and storage of test samples
ISO 740:1976 ISO
Sodium carbonate for industrial use — Determination of total soluble alkalinity — Titrimetric method
ISO 746:1976 ISO
Sodium carbonate for industrial use — Determination of matter insoluble in water at 50 degrees C
ISO 1686:1976 ISO
Sodium and potassium silicates for industrial use — Samples and methods of test — General
ISO 1690:1976 ISO
Sodium and potassium silicates for industrial use — Determination of silica content — Gravimetric method by insolubilization
ISO 1689:1976 ISO
Sodium and potassium silicates for industrial use — Calculation of the ratio : silicon dioxide/sodium oxide or silicon dioxide/potassium oxide
ISO 3357:1975 ISO
Estado: Published / 1975-09-01
Sodium tripolyphosphate and sodium pyrophosphate for industrial use — Determination of total phosphorus(V) oxide content — Quinoline phosphomolybdate gravimetric method
ISO 3332:1975 ISO
Estado: Published / 1975-07-01
Ammonium sulphate for industrial use — Determination of ammoniacal nitrogen content — Titrimetric method after distillation
ISO 3199:1975 ISO
Estado: Published / 1975-02-01
Sodium chlorate for industrial use — Determination of chlorate content — Dichromate titrimetric method
ISO 2366:1974 ISO
Estado: Published / 1974-11-01
Cryolite, natural and artificial — Determination of sodium content — Flame emission and atomic absorption spectrophotometric methods
ISO 2992:1974 ISO
Estado: Published / 1974-04-01
Ammonium sulphate for industrial use — Determination of iron content — 2,2'- Bipyridyl photometric method
ISO 2993:1974 ISO
Ammonium sulphate for industrial use — Determination of free acidity — Titrimetric method
ISO 2831:1973 ISO
Estado: Published / 1973-12-01
Sodium fluoride for industrial use — Determination of water-insoluble matter
ISO 2832:1973 ISO
Sodium fluoride for industrial use — Determination of moisture content
ISO 2833:1973 ISO
Sodium fluoride for industrial use — Determination of fluorine content — Modified Willard-Winter method
ISO 2830:1973 ISO
Cryolite, natural and artificial — Determination of aluminium content — Atomic absorption method
ISO 2460:1973 ISO
Estado: Published / 1973-04-01
Sodium hydrogen carbonate for industrial use — Determination of iron content — 1,10- Phenanthroline photometric method
ISO 2462:1973 ISO
Sodium chlorate for industrial use — Determination of moisture content — Gravimetric method
ISO 2463:1973 ISO
Sodium chlorate for industrial use — Determination of chloride content — Mercurimetric method
ISO 2461:1973 ISO
Sodium chlorate for industrial use — Determination of matter insoluble in water
ISO 2482:1973 ISO
Estado: Published / 1973-02-01
Sodium chloride for industrial use — Determination of calcium and magnesium contents — EDTA complexometric methods
ISO 2481:1973 ISO
Estado: Published / 1973-01-01
Sodium chloride for industrial use — Determination of halogens, expressed as chlorine — Mercurimetric method
ISO 2483:1973 ISO
Sodium chloride for industrial use — Determination of the loss of mass at 110 degrees C
ISO 2367:1972 ISO
Estado: Published / 1972-12-01
Cryolite (natural and artificial) — Determination of aluminium content — 8- Hydroxyquinoline gravimetric method
ISO 2479:1972 ISO
Sodium chloride for industrial use — Determination of matter insoluble in water or in acid and preparation of principal solutions for other determinations
ISO 2480:1972 ISO
Sodium chloride for industrial use — Determination of sulphate content — Barium sulphate gravimetric method
ISO 2122:1972 ISO
Estado: Published / 1972-06-01
Sodium and potassium silicates for industrial use — Preparation of solution of products not easily soluble in boiling water and determination of matter insoluble in water