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UNE 33124:1981 DETERMINATION OF PROLINE IN WINES AND VINEGARS.
UNE 55585:1981 SURFACE ACTIVE AGENTS. SODIUM CARBONATE FOR USE AS RAW-MATERIAL IN DETERGENT FORMULATIONS. DETERMINATION OF MATTER INSOLUBLE IN WATER AT 50 ºC
UNE 55608:1981 SURFACE ACTIVE AGENTS. SODIUM HYDROXIDE FOR USE AS RAW-MATERIAL IN DETERGENT FORMULATIONS. DETERMINATION OF SILICA CONTENT. GRAVIMETRIC METHOD BY PRECIPITATION OF QUINOLINE MOLYBDOSILICATE
UNE 55609:1981 SURFACE ACTIVE AGENTS. SODIUM HYDROXIDE FOR USE AS RAW-MATERIAL IN DETERGENT FORMULATIONS. DETERMINATION OF SULPHATE CONTENT. BARIUM SULPHATE GRAVIMETRIC METHOD
UNE 36097-1:1981 HOT ROLLED PLAIN BARS FOR THE REINFORCEMENT OF CONCRETE. CHARACTERISTICS
UNE 34202:1981 SODIUM CHLORIDE. DETERMINATION OF MATTER INSOLUBLE IN WATER OR IN ACID AND PREPARATION OF PRINCIPAL SOLUTIONS FOR OTHER DETERMINATION.
UNE 34203:1981 SODIUM CHLORIDE. DETERMINATION OF THE OSS OF MAS AT 110 C.
UNE 34204:1981 SODIUM CHLORIDE. DETERMINATION OF CALCIUM AND MAGNESIUM CONTENTS. EDTA COMPLEXOMETRIC METHODS.
UNE 34206:1981 SODIUM CHLORIDE. DETERMINATION OF NITRITE CONTENT. PERMANGANIMETRIC METHOD.
UNE 34207:1981 SODIUM CHLORIDE. DETERMINATION OF IODIDE CONTENT. IODIMETRIC METHOD.
UNE 34208:1981 SODIUM CHLORIDE. DETERMINATION OF POTASIUM CONTENT. TITRIMETRIC METHOD WITH SODIUM.