ISO 7890-1 Water Quality — Determination of Nitrate by UV Spectrometry

Comprehensive Guide to ISO 7890-1 Water Quality Determination of Nitrate by UV Spectrometry Laboratory Testing Service Provided by Eurolab

ISO 7890-1, titled Water quality Determination of nitrate Part 1: Spectrometric method, is an international standard published by the International Organization for Standardization (ISO). This standard outlines a method for determining the concentration of nitrate in water samples using ultraviolet spectrometry. The test is widely used to assess the quality of drinking water, wastewater, and surface water.

Legal and Regulatory Framework

The ISO 7890-1 standard is developed by Technical Committee (TC) 120: Water Quality, which is responsible for developing standards related to water quality testing. The standard has been adopted as a national standard in several countries, including the United States, where it is published as ASTM D7785.

International and National Standards

The ISO 7890-1 standard is part of a series of standards that cover nitrate determination methods. Some notable standards related to this topic include:

Standard Development Organizations

The International Organization for Standardization (ISO) is a non-governmental organization that develops voluntary international standards. ISO works closely with national standards bodies, such as the American National Standards Institute (ANSI), Deutsches Institut für Normung (DIN), and British Standards Institution (BSI), to develop and adopt standards.

Standard Evolution and Updates

Standards are continually updated to reflect changes in technology, testing methods, and regulations. ISO 7890-1 was first published in 1994 and has undergone two revisions: in 2003 and 2015. The standard is reviewed every five years to ensure its relevance and accuracy.

Standard Compliance Requirements

Compliance with ISO 7890-1 is mandatory for laboratories that perform nitrate determination using ultraviolet spectrometry. Industry sectors that require compliance include:

Why This Test Is Needed and Required

Nitrate contamination in water sources can have serious health implications, including methemoglobinemia (blue baby syndrome) in infants. The ISO 7890-1 standard provides a reliable method for determining nitrate levels, ensuring the safety of drinking water supplies.

The consequences of not performing this test include:

To perform the ISO 7890-1 test, laboratories must follow a series of steps:

1. Sampling: Collect water samples from the site being tested.

2. Sample preparation: Prepare the sample by diluting it to an appropriate concentration for analysis.

3. Instrument calibration: Calibrate the ultraviolet spectrophotometer using standards and controls.

4. Analysis: Measure the absorbance of the sample at a specific wavelength (214 nm).

5. Calculation: Calculate the nitrate concentration based on the measured absorbance.

The test report must include:

1. Sample identification

2. Analysis method

3. Results: Include the calculated nitrate concentration, standard deviation, and confidence interval.

4. Quality control measures

5. Certification and accreditation information

The benefits of performing ISO 7890-1 testing include:

Eurolabs expertise in ISO 7890-1 testing includes:

By partnering with Eurolab, clients can be assured of receiving accurate and reliable results.

Conclusion

ISO 7890-1 is an essential standard for laboratories that perform nitrate determination using ultraviolet spectrometry. By following this comprehensive guide, laboratories can ensure compliance with regulations and standards, protecting against health risks associated with nitrate contamination.