431. BS ISO 23696-2. Water quality. Determination of nitrate in water using small-scale sealed tubes. Part 2. Chromotropic acid based method (11th January 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (13 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
432. BS EN ISO 23826. Gas cylinders. Ball valves. Specification and testing. (14th January 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (32 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
433. BS ISO 23696-1. Water quality. Determination of nitrate in water using small-scale sealed tubes. Part 1. Dimethylphenol based method (11th January 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (13 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
434. Packaging for terminally-sterilized medical devices. Method for determination of methylene blue particulate penetration. (25th January 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (34 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
435. Water quality. Determination of cyclic volatile methylsiloxanes in water. Method using liquid-liquid extraction with gas chromatography-mass spectrometry (GC-MS) Part 2, (5th February 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (24 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗
436. BS ISO 23695. Water quality. Determination of ammonium nitrogen in water. Small-scale sealed tube method. (11th January 2021) Authors: British Standards Institution, Record Type: Book Extent: 1 online resource (18 pages) View Content: Available online (eLD content is only available in our Reading Rooms) ↗