Chlorine Standards - Math To determine the concentration of the prepared standard: Volume Standard Added / (Volume Standard + Sample Volume) x Standard Concentration Example: 64.79 mg/L, 0.10 ml added to 10 ml (0.1 ml / (0.1 ml + 10 ml)) x 64.79 mg/L (0.0099) x 64.79 mg/L = 0.64 mg/L To make a standard of a specific concentration, change the volume added and recalculate until you get the concentration needed.
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