Table 10-8. - Recommendation for Sample Volume and Preservation of Sample - Continued

**Preservative

**Conductance

**preservative

then the milliliters required for the first sample could be figured like this:

SAMPLE STOWAGE

To get the best results, samples should be analyzed as soon as possible after they are collected. Some tests, such as DO, temperature, and pH must be performed at the time of collection since the results can change while the sample is being carried to the lab. Some other tests may be delayed if the sample is properly stored. The most common means of preserving a sample is to cool it to 2°C to 10°C. Table 10-8 shows some ways to preserve the sample.