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ISO 21793:2020 Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb), dissolved bound nitrogen (DNb), total bound phosphorus (TPb) and dissolved bound phosphorus (DPb) after wet chemical ca >
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ISO 21793:2020 Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb), dissolved bound nitrogen (DNb), total bound phosphorus (TPb) and dissolved bound phosphorus (DPb) after wet chemical ca, 2020
- Foreword
- Introduction
- 1 Scope
- 2 Normative references
- 3 Terms and definitions
- 4 Principle
- 5 Interferences
- 5.1 General
- 5.2 TOC
- 5.3 TN
- 5.4 TP
- 6 Reagents
- 7 Solution preparations
- 7.1 Blank solution
- 7.2 Sample oxidation solutions
- 7.2.1 Sulfuric acid TIC and catalyst solution
- 7.2.2 Base oxidation solution
- 7.2.3 TP solution
- 7.2.4 TP hydrolysis solution
- 7.3 Calibration stock solutions
- 7.4 Individual calibration standard solutions
- 7.4.1 TOC
- 7.4.2 TN
- 7.4.3 TP
- 7.4.4 Combined calibration standard solutions
- 7.5 System check stock solutions
- 7.5.1 TOC and TN stock solution
- 7.5.2 TP stock solution
- 7.6 Particle processing control solution
- 7.7 Gases
- 8 Apparatus
- 9 Quality requirements for the analytical system
- 9.1 System check
- 9.2 Recovery and variation of replicate determinations for particle processing control for TOC, TNb, and TPb
- 10 Sampling and sample preparation
- 10.1 Sampling and sample injection
- 11 Procedure
- 11.1 General
- 11.2 Calibration
- 11.3 Validity check of the calibration function
- 11.4 Measurement
- 11.4.1 General
- 11.4.2 Determination
- 12 Evaluation
- 13 Expression of results
- 14 Test report
- Annex A (normative) Determination of total organic carbon that includes purgeable organic carbon by difference
- Annex B (informative) Performance data TOC/TN
- Annex C (informative) Informative validation data, system check recovery and particle check recovery for TOC/TN/TP
- Bibliography [Go to Page]