UNE - Spanish national standards

Determination of boron(III) oxide in refractory products - Part 2: Acid extraction method for the determination of boron(III) oxide in binder components (ISO 21078-2:2006)

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Chemical analysis of refractories containing alumina, zirconia and silica - Refractories containing 5 percent to 45 percent of ZrO2 (alternative to the X-ray fluorescence method) - Part 1: Apparatus, reagents and dissolution (ISO 21079-1:2008) (Endorsed by AENOR in June of 2008.)

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Chemical analysis of refractories containing alumina, zirconia, and silica - Refractories containing 5 percent to 45 percent of ZrO2 (alternative to the X-ray fluorescence method) - Part 2: Wet chemical analysis (ISO 21079-2:2008) (Endorsed by AENOR in June of 2008.)

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Chemical analysis of refractories containing alumina, zirconia, and silica - Refractories containing 5 percent to 45 percent of ZrO2 (alternative to the X-ray fluorescence method) - Part 3: Flame atomic absorption spectrophotometry (FAAS) and inductively coupled plasma emission spectrometry (ICP -AES) (ISO 21079-3:2008) (Endorsed by AENOR in June of 2008.)

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Information and documentation -- International Standard Book Number (ISBN)

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Test method to measure the efficiency of air filtration media against spherical nanomaterials - Part 1: Size range from 20 nm to 500 nm (ISO 21083-1:2018)

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Test method to measure the efficiency of air filtration media against spherical nanomaterials - Part 2: Size range from 3 nm to 30 nm (ISO/TS 21083-2:2019) (Endorsed by Asociación Espanola de Normalización in May of 2019.)

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COMMERCIAL PURITY ALUMINIUM FOR CONNECTION BARS. CHARACTERISTICS.

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Textiles - Method for determination of alkylphenols (AP) (ISO 21084:2019)

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SURGE ARRESTERS. PART 3: ARTIFICIAL POLLUTION TESTING OF SURGE ARRESTERS.

Available languages: Spanish

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