LaMotte DIAGRAM FOR AQ-3 - Manual (Page 12)

HIGH CHLO RIDE AND SA LIN ITY READ INGS
For high chloride and salinity readings the sample must be carefully diluted to
bring it within a practicable range for titration. Dilutions of 1 to 20 or 1 to
100 are recommended. (For example: 1 mL of sample water is diluted to a
total of 20 mL with distilled water. This is a 1 to 20 dilution.) Titration tube is
then filled to 15 mL line with diluted sample, and the titration is performed as
described. The Titrator reading is multiplied by the appropriate conversion
factor given below for parts per million (ppm), parts per thousand (ppt), or
percent (%) Chloride.
1-20 DILUTION
ppm chloride = Titrator Reading x 20
ppt chloride = Titrator Reading x 0.02
% chloride = Titrator Reading x 0.002
1-100 DILUTION
ppm
chloride = Titrator Reading x 100
ppt chloride = Titrator Reading x 0.1
% chloride = Titrator Reading x 0.01
To convert parts per thousand (ppt) Chloride to parts per thousand (ppt)
Salinity use the following formula:
ppt salinity = (1.805 x ppt chloride ) + 0.03
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