LaMotte Fresh Water Aquaculture - Manual (Page 15)

15
Chloride
DESCRIPTION CODE
*Chloride Reagent #1 *4504-E
*Chloride Reagent #2 *4505DR-H
*Phenolphthalein Indicator, 1% *2246-E
*Sulfuric Acid, 0.5N *6090-E
Direct Reading Titrator, 0-200 Range 0382
Test Tube, 5-10-12.9-15-20-25 mL, glass, w/cap 0608
*WARNING: Reagents marked with an * are considered to be potential health hazards.
To view or print a Material Safety Data Sheet (MSDS) for these reagents go to
www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
The Titrator is calibrated in terms of chloride expressed as ppm Cl
_
. Each minor division
on the Titrator scale equals 4.0 ppm Cl
_
.
HIGH CHLORIDE AND SALINITY READINGS
For high chloride and salinity readings the sample must be carefully diluted to bring it
within a practical 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 fi lled 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 to 20 DILUTION
ppm chloride = Titrator Reading x 20
ppt chloride = Titrator Reading x 0.02
% chloride = Titrator Reading x 0.002
1 to 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