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Water collected specifically for these tests must not be preserved with chemicals. gost 3351 74 skachat besplatno pdf
Methods to measure the presence of suspended particles (such as silt, clay, or organic matter) that interfere with light passing through the water. 📋 Strict Sampling Rules You can download the for free via CAWater-Info
To ensure high-precision results, the standard dictates rigid rules for handling samples: The sample volume must be at least gost 3351 74 skachat besplatno pdf