NEN EN ISO 11905-1 : 1998
Current
The latest, up-to-date edition.
WATER QUALITY - DETERMINATION OF NITROGEN - PART 1: METHOD USING OXIDATIVE DIGESTION WITH PEROXODISULFATE
12-01-2013
1 Scope
2 Normative references
3 Range of detection
4 Sensitivity
5 Principle
6 Reagents
7 Apparatus
8 Sampling and samples
9 Procedure
9.1 Test portion
9.2 Blank test
9.3 Cleaning digestion vessels
9.4 Digestion
9.5 Verification of recovery of organic nitrogen
9.6 Starting operation
9.7 Initial sensitivity setting
9.8 Calibration
9.9 Determination
10 Expression of results
10.1 Method of calculation
10.2 Precision data
11 Test report
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