Test Procedures
TANNIN
TUNGSTO-MOLYBDOPHOSPHORIC ACID METHOD • CODE 3666-01-SC
QUANTITY
CONTENTS
CODE
30 mL
* Tannin Reagent #1
*7833-G
2 x 60 mL
* Tannin Reagent #2
*7834-H
Pipet, plain, plastic
0352
Pipet, 1.0 mL, plastic
0354
*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).
Tannin and lignin are examples of hydroxylated aromatic compounds found in discharge
wastewater from paper mills, in some boiler water treatment, in natural brackish water,
and in wastewater from leather tanning plants. The taste and odor of these compounds is
generally off ensive so that their control is important in many areas.
APPLICATION:
Industrial wastewaters; boiler and cooling waters; natural
waters.
RANGE:
0.0–10.0 ppm Tannic Acid
MDL:
0.2 ppm
METHOD:
The hydroxylated aromatic compounds will reduce a mixture
of tungstophosphoric and molybdophosphoric acids to form
a blue color in proportion to the concentration of aromatic
hydroxyl groups.
SAMPLE HANDLING &
PRESERVATION:
Sample should be analyzed as soon as possible after
collection.
INTERFERENCES:
Other reducing compounds such as ferrous iron and sulfi tes.
Results may be expressed as tannin like compounds, or
aromatic hydroxy compounds.
SMART Spectro 2 Test Procedures 05.02.16
TANNIN
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