LaMotte SMART3 Colorimeter - Manual (Page 99)

BORON
AZOMETHINE-H METHOD · CODE 4868-01
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
1 Dark storage chamber, brown 0108
*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.
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 effl uent entering waterways.
Boron compounds are used in cleaning compounds, paper and paints, fertilizers,
glass and ceramics, fi re retardants and the production of alloys. In the atomic
energy fi eld, 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
MDL: 0.05
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.
SMART3 Test Procedures 2.11 BORON
Test P
rocedures