NEMI Method Summary


Method Summary Information

Method Number:

I-1586

Media:

WATER

Revision:

1985

Method Source:

U.S. Geological Survey (USGS)

Subcategory:

INORGANIC

Analytes in this method

Official Name:

pH in Water by Electrometry Using a Glass-Electrode

Descriptive Name

Water pH

Source Info:

USGS Branch of Information Services
Box 25286, MS 417
Federal Center
Denver, CO 80225-0286
Phone: 303-202-4700

Citation:

USGS Methods, Volume A1

78247

Byte file

Brief Method
Summary:

This method involves pH-meter operation and may be automated with commercially available instrumentation.

Scope And
Application:

This method may be used to determine the pH of any natural or treated water and any industrial or other wastewater.

Applicable
Conc Range:

None given.

Interferences:

(1) Sodium error may bias results at pH > 10 unless a "low sodium error" electrode is used. (2) Coatings of oily material can impair electrode. (3) Temperature effects.

QC Requirements:

Calibrate instrument using calibration standards (CAL); quality control samples (QCS); and laboratory blanks (LB) analyzed at a minimum of 1 for every 10 samples.

Sample Handling:

Container Description: 125 mL polyethylene bottle.
Treatment and Handling: Use unfiltered sample to rinse bottle. Max holding time: 180 days.

Max Holding Time:

180 days

Relative Cost:

Less than $50

4762

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Method Summary Information