Phenols – LaMotte DC1600 Colorimeter User Manual

Page 69

PHENOLS

AMINOANTIPYRINE METHOD

CODE 3652

QUANTITY

CONTENTS

CODE

5 g

Aminoantipyrine Reagent

7825-C

30 mL

*Ammonium Hydroxide Solution

*7826-G

2 x 60 mL

*Potassium Ferricyanide Solution

*7827-H

Spoon, 0.1 g, plastic

0699

Pipet, plain, plastic

0352

Pipet, 1.0 mL, plastic

0354

*WARNING: Reagents marked with a * are considered hazardous substances. Material Safety Data Sheets (MSDS) are supplied for

these reagents. For your safety, read label and accompanying MSDS before using.

Phenols may occur in domestic and industrial waste waters and in drinking water supplies. Chlorination of waters

containing phenols may produce odiferous and objectionable tasting chlorophenols. Natural waters seldom contain more

than 1 mg/L phenol.
Phenols may be removed from water by various treatment processes including chlorination and activated carbon

absorption.

APPLICATION:

Drinking and surface waters; domestic and industrial waste water.

RANGE:

0 – 6.0 ppm Phenol

METHOD:

4-Aminoantipyrine is oxidized in the presence of all ortho- and meta- substituted phenols to

form a colored complex in proportion to the amount of phenol present.

SAMPLE HANDLING

& PRESERVATION:

Phenols are subject to biological and chemical oxidation. Samples should be analyzed within

4 hours after collection. If sample cannot be analyzed within 4 hours it can be preserved by

acidification with phosphoric acid to pH 4.0.

INTERFERENCES:

Oxidizing and reducing chemicals, alkaline pH values, and phenol decomposing bacteria may

interfere with the test.