BS ISO 23697-2:2023

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Water quality. Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes – Chromotropic acid colour reaction

Published By	Publication Date	Number of Pages
BSI	2023	18

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Categories: 13.060.50 - Examination of water for chemical substances, BSI

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Description

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PDF Pages	PDF Title
2	National foreword
6	Foreword
7	Introduction
9	1 Scope 2 Normative references 3 Terms and definitions
10	4 Principle 5 Interferences
11	6 Sampling and sample preparation 7 Reagents 8 Apparatus
12	8.1 Photometer or spectrophotometer for reading small-scale sealed tubes. 9 Oxidation and colour reactions principle 9.1 General 9.2 Chromotropic acid colour reaction
13	10 Quality control 10.1 Verification of the calibration 10.2 System and interferences checks 11 Calculation
14	12 Expression of results 13 Test report
15	Annex A (informative) Performance data
16	Bibliography

Additional information

Status	Definitive
Pages	18
Publication Date	2023-02-07
ISBN	978 0 539 15472 6
Standard Number	BS ISO 23697-2:2023
Title	Water quality. Determination of total bound nitrogen (ST-TNb) in water using small-scale sealed tubes – Chromotropic acid colour reaction
Identical National Standard Of	ISO 23697-2
Descriptors	Chromotropic acid, Watering, Tubes (pipes), Water supply, Group Ia inorganic compounds, Nitric acid, Nitrous oxide, Organic nitrogen compounds (aliphatic)
Publisher	BSI
Committee	EH/3/2
ICS Codes	13.060.50 - Examination of water for chemical substances

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BS ISO 23697-2:2023

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