Test Procedures
CHROMIUM, TESTAB
DIPHENYLCARBOHYDRAZIDE TESTAB METHOD • CODE 3697-SC
QUANTITY
CONTENTS
CODE
50
*Chromium Spectrophotometric Grade Tablets
*3889A-H
1
Tablet Crusher
0175
*WARNING:
Reagents marked with an * are considered to be potential health hazards. To
view or print a Safety Data Sheet (SDS) for these reagents go to www.lamotte.com.
Search for the four digit reagent code number listed on the reagent label, in the contents
list or in the test procedures. Omit any letter that follows or precedes the four digit code
number. For example, if the code is 4450WT-H, search 4450. To obtain a printed copy,
contact LaMotte by email, phone or fax.
Emergency information for all LaMotte reagents is available from Chem-Tel:
(US, 1-800-255-3924) (International, call collect, 813-248-0585).
Chromium is one of a class of heavy metals found in the bottom mud of polluted bodies of
water. It is considered to be a toxic chemical. Chromium will become concentrated in some
shellfi sh, endangering the health of the human or animal that consumes them. Chromium
may be present in water containing waste from industries such as metal plating. If more
than 0.5 ppm chromium is present, it is evidence of contamination from untreated or
incompletely treated industrial waste.
APPLICATION:
Drinking, surface, and saline waters; domestic and
industrial wastewaters.
RANGE:
0.00–1.00 ppm Chromium
MDL:
0.03 ppm
METHOD:
Hexavalent chromium reacts with 1,5
diphenylcarbohydrazide under acidic conditions to
form a red-purple color in proportion to the amount of
chromium present.
SAMPLE HANDLING &
PRESERVATION:
Analysis for chromium should be made as quickly as
possible. Storage in plastic or glass containers may
result in low results.
INTERFERENCES:
High concentrations of mercurous and mercuric ions
may impart a blue color to the chromium determination.
Iron and vanadium in concentrations above 1 ppm may
result in a yellow color.
SMART Spectro 2 Test Procedures 05.02.16
CHROMIUM
, TESTAB
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