BS EN ISO 13395:1996

Committees responsible
National foreword
Foreword
1 Scope
2 Normative references
3 Principle
4 Reagents
5 Apparatus
6 Checking the flow system
7 Sampling and sample preparation
8 Interferences
9 Procedure
10 Evaluation
11 Expression of results
12 Precision
13 Test report
Annex A (informative) - Examples of flow injection systems
                        (5.1) for the determination of
                        nitrite(N) and nitrite/nitrate(N)
Annex B (informative) - Examples of continuous flow systems
                        (5.2) for the determination of
                        nitrate(N) and nitrite/nitrate(N)
Annex C (informative) - Example of a continuous flow system
                        (so-called "macroflow") (5.2) for
                        the determination of 0,2 mg/l
                        to 2 mg/l nitrite/nitrate(N)
Annex D (informative) - Bibliography
List of references

Describes a method for the determination of nitrite(N), nitrate(N) or the sum of both [nitrite/nitrate(N)], in various types of waters (such as ground, drinking, surface, and waste waters) in mass concentrations ranging from 0,01 mg/l to 1 mg/l for nitrite(N) and from 0,2 mg/l to 20 mg/l for nitrite/nitrate(N), both in the undiluted sample.

This International Standard specifies a method for the determination of nitrite(N) (see note2), nitrate(N) or the sum of both [nitrite/nitrate(N)], in various types of waters (such as ground, drinking, surface, and waste waters) in mass concentrations ranging from 0,01mg/l to 1mg/l for nitrite(N) and from 0,2mg/l to 20mg/l for nitrite/nitrate(N), both in the undiluted sample. The range of application can be changed by varying the operating conditions. NOTES Seawater may be analysed with changes in respect to sensitivity and adaptation of the carrier solution and calibration solutions to the salinity of the samples. The following concise terms are used in the text of this International Standard: nitrite(N): (mass concentration of) nitrite, expressed as nitrogen nitrate(N): (mass concentration of) nitrate, expressed as nitrogen nitrite/nitrate(N): (mass concentration of) the sum of nitrite(N) and nitrate(N)