TEST INSTRUCTIONS - Geotech Environmental Equipment
TEST INSTRUCTIONS - Geotech Environmental Equipment
TEST INSTRUCTIONS - Geotech Environmental Equipment
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CHROMIUM<br />
DIPHENYLCARBOHYDRAZIDE METHOD CODE 3697-SC<br />
QUANTITY CONTENTS CODE<br />
50 *Chromium Spectrophotometric Grade Tablets *3889A-H<br />
1 Tablet Crusher 0175<br />
*WARNING: Reagents marked with a * are considered to be potential health<br />
hazards. To view or print a Material Safety Data Sheet (MSDS) for these reagents see<br />
MSDS CD or www.lamotte.com. To obtain a printed copy, contact LaMotte by email,<br />
phone or fax.<br />
Chromium is one of a class of heavy metals found in the bottom mud of<br />
polluted bodies of water. It is considered to be a toxic chemical. Chromium will<br />
become concentrated in some shellfish, endangering the health of the human<br />
or animal that consumes them. Chromium may be present in water containing<br />
waste from industries such as metal plating. If more than 0.5 ppm chromium is<br />
present, it is evidence of contamination from untreated or incompletely treated<br />
industrial waste.<br />
APPLICATION: Drinking, surface, and saline waters; domestic and industrial<br />
wastewaters.<br />
RANGE: 0.00–1.00 ppm Chromium<br />
METHOD: Hexavalent chromium reacts with 1,5<br />
diphenylcarbohydrazide under acidic conditions to form a<br />
red-purple color in proportion to the amount of chromium<br />
SAMPLE<br />
HANDLING &<br />
PRESERVATION:<br />
present.<br />
Analysis for chromium should be made as quickly as possible.<br />
Storage in plastic or glass containers may result in low<br />
results.<br />
INTERFERENCES: High concentrations of mercurous and mercuric ions may<br />
impart a blue color to the chromium determination. Iron<br />
and vanadium in concentrations above 1 ppm may result in<br />
a yellow color.<br />
Smart2 <strong>TEST</strong> PROCEDURES 1.07 Chromium-TesTab 1/2