LaMotte DC1600 Colorimeter - 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
1 Spoon, 0.1 g, plastic 0699
1 Pipet, plain, plastic 0352
1 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.
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