LaMotte SMART 2 Electronic Soil Lab - Manual (Page 79)

SULFUR
BARIUM CHLORIDE METHOD CODE 3639-45-65-SC
QUANTITY CONTENTS CODE
10 g *Sulfate Reagent *V-6277-D
1 Spoon, 0.1 g 0699
*WARNING: Reagents marked with a * are considered to be potential health hazards. To view
or print a Material Safety Data Sheet (MSDS) for these reagents see MSDS CD or
www.lamotte.com. To obtain a printed copy, contact LaMotte by e-mail, phone or fax.
Sulfur is essential to the formation of protein and affects various aspects of
plant metabolism. Sulfur-deficient plants are pale green in color with thin,
reedy stems. Negatively charged sulfate ions are easily leached. The major
sources of soil sulfate are fertilizer containing sulfate compounds and
atmospheric sulfur dioxide carried into the soil by precipitation.
RANGE: 3-94 ppm Sulfur
METHOD: Sulfate ion is precipitated in an acid medium with
barium chloride to form barium sulfate crystals in
proportion to the amount of sulfate present.
INTERFERENCE: Suspended matter and color interference may be
removed by a filtration step. Silica in excess of
500 mg/L will interfere.
SMART2 SOIL MANUAL 1.07 79