Test Procedures
CHROMIUM-HEXAVALENT, TRIVALENT & TOTAL
DIPHENYLCARBOHYDRAZIDE METHOD • CODE 3698-SC
QUANTITY
CONTENTS
CODE
60 mL
*Sulfuric Acid, 5N
*7681-H
10 g
*Chromium Reagent Powder
*V-6276-D
15 mL
*Sodium Azide, 5%
*7683-E
30 mL
Potassium Permanganate, 0.5%
7682-G
60 mL
Deionized Water
5115PT-H
1
Pipet, plain, glass, w/cap
0341
1
Pipet, 1.0 mL, plastic
0354
1
Spoon, 0.1 g, plastic
0699
1
Graduated Cylinder, 50 mL, glass
0418
1
Erlenmeyer Flask, 125 mL, glass
0431
1
Test tube holder
1113
1
Filter Paper
0465
1
Funnel, Plastic
0459
*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).
A toxic chemical, chromium is found in two forms in the water; trivalent chromium (Cr
3+
)
and hexavalent chromium (Cr
6+
). Chromium enters the water from industrial waste.
Hexavalent chromium is more toxic than trivalent chromium. Levels greater than 0.5 ppm
indicate improperly treated industrial waste. It is important to maintain chromium levels at
or below 0.5 ppm, because clams and other shellfi sh will store chromium in their systems,
accumulating levels which may be dangerous to the consumer, whether human or animal.
SMART Spectro 2 Test Procedures 05.02.16
CHROMIUM
, HEXAVALENT, TRIVALENT & TOTAL
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