Tannin – LaMotte SMART3 Colorimeter User Manual

Page 285

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 Material Safety Data Sheet (MSDS) for these reagents

go to www.lamotte.com. To obtain a printed copy, contact LaMotte 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

MDL:

0.1 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.

SMART3 Test Procedures 11.10

TANNIN

Test P

rocedures