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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.

UNE 30219:1978  UNE

Estado: Vigente / 1978-01-15

Nitrato amónico para uso industrial. Determinación de la acidez libre. Método volumétrico.

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

Estado: Vigente / 1968-11-15

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

Estado: Published / 1976-09-01

Cryolite, natural and artificial — Preparation and storage of test samples

ISO 1620:1976  ISO

Estado: Published / 1976-09-01

Cryolite, natural and artificial — Determination of silica content — Reduced molybdosilicate spectrophotometric method

ISO 1694:1976  ISO

Estado: Published / 1976-09-01

Cryolite, natural and artificial — Determination of iron content — 1,10- Phenanthroline photometric method

ISO 3391:1976  ISO

Estado: Published / 1976-09-01

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

Estado: Published / 1976-08-01

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

Estado: Published / 1976-02-01

Sodium carbonate for industrial use — Determination of total soluble alkalinity — Titrimetric method

ISO 746:1976  ISO

Estado: Published / 1976-02-01

Sodium carbonate for industrial use — Determination of matter insoluble in water at 50 degrees C

ISO 1686:1976  ISO

Estado: Published / 1976-02-01

Sodium and potassium silicates for industrial use — Samples and methods of test — General

ISO 1690:1976  ISO

Estado: Published / 1976-02-01

Sodium and potassium silicates for industrial use — Determination of silica content — Gravimetric method by insolubilization

ISO 1689:1976  ISO

Estado: Published / 1976-02-01

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

Estado: Published / 1974-04-01

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

Estado: Published / 1973-12-01

Sodium fluoride for industrial use — Determination of moisture content

ISO 2833:1973  ISO

Estado: Published / 1973-12-01

Sodium fluoride for industrial use — Determination of fluorine content — Modified Willard-Winter method

ISO 2830:1973  ISO

Estado: Published / 1973-12-01

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

Estado: Published / 1973-04-01

Sodium chlorate for industrial use — Determination of moisture content — Gravimetric method

ISO 2463:1973  ISO

Estado: Published / 1973-04-01

Sodium chlorate for industrial use — Determination of chloride content — Mercurimetric method

ISO 2461:1973  ISO

Estado: Published / 1973-04-01

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

Estado: Published / 1973-01-01

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

Estado: Published / 1972-12-01

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

Estado: Published / 1972-12-01

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