LaMotte COD Plus Colorimeter 1922-EX2 - Manual (Page 74)

BORON
AZOMETHINE-H METHOD
· CODE 4868
QUANTITY CONTENTS CODE
120 mL *Boron Buffer *4869 - J
10 g *Boron Indicator Powder *4870 - D
1 Pipet, plastic, 1.0 mL 0354
1 Spoon, 0.15 g 0727
*WARNING: Reagents marked with a * are considered hazardous substances. Material
Safety Data Sheets (MSDS) are supplied for these reagents. For your safety read label
and accompanying MSDS before using.
Small amounts of boron are necessary for plant growth but large amounts can
be toxic. In humans, boron aids in the uptake of calcium and the production of
strong bones. An excess of boron can affect the central nervous system
resulting in a syndrome known as borism. Some natural waters may contain
small amounts of boron. Large concentrations may be due to industrial effluent
entering waterways. .Boron compounds are used in cleaning compounds, paper
and paints, fertilizers, glass and ceramics, fire retardants and the production of
alloys. In the atomic energy field, boron is a component of neutron shields and
nuclear reactors. Some swimming pools use boron buffering systems.
APPLICATION:
Surface and saline waters, hydroponic solutions, industrial
waste, swimming pools.
RANGE: 0.00 - 0.80 ppm Boron
METHOD: Azomethine-H and borate form a yellow complex at pH 6 in
proportion to the concentration of boron present.
SAMPLE
HANDLING &
PRESERVATION: Store samples in polyethylene bottles. Do not use borate
detergents or glassware.
INTERFERENCES: Interferences in drinking water are unlikely. Manganese,
zirconium, chromium, titanium, copper, vanadium,
aluminum, beryllium and iron may cause high results.
COD PLUS TEST PROCEDURES 2/04 BORON 1/2