LaMotte SMART 3 Electronic Soil Lab - Manual (Page 63)

SMART3 Soil 1.11 63
CHLORIDE
DIRECT READING TITRATOR METHOD • CODE M7241
QUANTITY CONTENTS CODE
15 mL *Chloride Reagent #1 *4504-E
60 mL *Silver Nitrate, 0.141N *3062DR-H
1 Test Tube, 5-10-15 mL, plastic, w/cap 0701
1 Spoon, 1g 0697
1 Test Tube, 5-10-15 mL, glass, w/cap 0778
1 Direct Reading Titrator, 0-1000 Range 0384
*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.
Chlorides are present in practically all soils. Application of fertilizer may increase
chloride levels. Chlorides are removed from soil by leaching. Excessive
concentrations are toxic to plants. A high test reading, particularly where stunted
growth has been observed, may indicate poisoning due to high chloride levels
in the soil. This test is valuable on saline soils or when contamination from sea
water or sea spray is suspected. Normal soils of humid regions rarely give
readable tests, except when recently receiving liberal amounts of fertilizers
containing chlorides.
RANGE: 0-1000 lb/acre Chloride
METHOD: In a neutral or slightly alkaline solution, potassium
dichromate indicates the endpoint of the silver nitrate
titration.
INTERFERENCES: Bromine, iodide and cyanide register as equivalent
chloride concentrations.
Test P
rocedures