How temperature affects your ammonium measurements.
Temperature influences the volume of liquids and the speed of chemical reactions. This way air and sample temperature can affect your analysis making results too high or too low.
The image below shows an example:
The typical effect of temperature when determining ammonium using the salicylate method.
Deviation from correct measurement result depending on the temperature of reagents, sample and/or environment.
10°C: fresh from refrigerator
30°C: summer heat in measuring room without air conditioning
Keeping an eye on temperatures and sticking to the correct temperatures improves the accuracy of your measurement results.
Read on to find out how to get the right results every time!
What you can do to improve the quality of your results:
Allow samples and reagents coming out of the fridge to warm up before being used.
Do not expose samples and reagents to direct sunlight.
Do not store samples and reagents close to the radiator.
Use a thermostat if required to achieve the correct temperature.
Observe the notes in the user instructions regarding temperatures and reaction times.
Check your analysis on a regular basis with a spiking solution and a standard solution.
Choose the optimum measuring range for your sample, thereby eliminating potential errors by dilution.
The new lab catalogue offers a comprehensive overview:
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Several components must come together in order to ensure results you can trust. This document contains valuable AQA guidelines.
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