For example, a hardness test result of 3 gpg as CaCO3 is equivalent to 51 mg/L as CaCO3.
Multiply gpg by 17.1 to get mg/L (1 gpg = 17.1 mg/L). What’s the formula for converting grains per gallon (gpg) to milligrams per liter (mg/L)? A grain per gallon is the weight of a substance in one gallon of water, similar to a milligram per liter. It’s a historic unit of weight once used for barleycorn. One grain is equivalent to 64.799 milligrams. Example: convert an absorbance of 0.505 to %T:.To convert a value from absorbance to percent transmittance, use the following equation: To convert a value from percent transmittance (%T) to absorbance, use the following equation:
How can I convert percent transmittance to absorbance, or absorbance to percent transmittance? For example, a chlorine concentration of 1.8 mg/L chlorine is equivalent to 1.8 ppm chlorine. Total Hardness Strips What’s the formula to convert mg/L to ppm?ġ mg/L = 1 ppm for dilute aqueous solutions.
Water should have a total hardness of less than 75 to 85mg/l as CaCO3 and a magnesium hardness of less than 40mg/l as CaCO3 to minimize scaling at elevated temperatures. Total Hardness = Calcium Hardness + Magnesium Hardness Total Alkalinity Products Water Hardness Levels Here is an example on how to find Total Alkalinity: 18ml of 0.01M of Sulfuric Acid was required to Titrate 50ml of your sample to pH 4.5. (ml) x 50,000 (mg CaCO3/eq) / sample volume (ml) Total Alkalinity is the amount of acid used to reach pH 4.5. In order to determine Alkalinity of your samples, samples will be titrated with sulfuric acid or hydrochloric acid to a certain pH end point (pH 8.3 for Phenolphthalein Alkalinity and pH 4.5 for Total Alkalinity), and the volume of the acid used for the titration will be recorded. More alkalinity in your water sample means more buffering capacity of your water sample. This capacity is attributed to bases that are present in natural waters including OH -, HCO 3 -, and CO 3 2. Alkalinity is defined as a measure of the buffering capacity of water to neutralize strong acid.
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