We have water samples from clean river that need to be tested for anion. However, the machine is currently not functional for a moment. Is there a technique to preserve the sample without using separate technique as I being told that separate method of preservation for each individual anion to be tested.
The rain samples we usually stabilize by cooling to a temperature of 4 ° C to 6 ° C, or freeze until analysis begins. For the determination of nitrite completely fill the sample container. The maximum storage period of collection of samples for analysis should not exceed three months. But the question is if you filtrate or not the sample and if you need or not pH measurements of the sample etc...
If you want to measure anions on IC, you have to filter the samples over 0.45 micro meter filters and preserve it in 4 degrees until analysis. The problem will be in measuring NO2 after a while of sample collection, you will not get precise values.
For low salinity waters if you are only looking at anions the simplest method is to freeze the samples and to keep them frozen until the analysis.
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