TEST INSTRUCTIONS - Geotech Environmental Equipment

TANNIN
TUNGSTO-MOLYBDOPHOSPHORIC ACID METHOD
CODE 3666-SC
QUANTITY CONTENTS CODE
30 mL *Tannin Reagent #1 *7833-G
2 x 60 mL *Tannin Reagent #2 *7834-H
1 Pipet, plain, plastic 0352
1 Pipet, 1.0 mL, plastic 0354
*WARNING: Reagents marked with an * are considered hazardous substances. To
view or print a Material Safety Data Sheet (MSDS) for these reagents see MSDS CD
or our web site. To obtain a printed copy, contact us by e-mail, phone or fax.
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 offensive so that their control is
important in many areas.
APPLICATION: Industrial wastewater, boiler water, and natural water.
RANGE: 0.0–10.0 ppm Tannic Acid
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 Sample should be analyzed as soon as possible after
HANDLING &
PRESERVATION:
collection.
INTERFERENCES: Other reducing compounds such as ferrous iron and sulfites.
Results may be expressed as tannin like compounds, or
aromatic hydroxy compounds.
Smart2 TEST PROCEDURES 2.04 Tannin 1/2