EPA Method 9040-B

EPA Method 9040-B does not directly match ALS - Columbia's list of currently available methods. Please call for availability.

Method information displayed is provided for informational purposes only. No warranty (express or implied) is made as to the website accuracy, completeness, or applicability (such as the age of a method and whether or not it applies to your project). Please contact us for assistance. Analytical testing dots

PDF IconView Actual EPA Method 9040-B (PDF File)

EPA Method 9040-B:
pH in Water by Electrometric Measurement. Official Name: pH Electrometric Measurement

The pH of the sample is determined electrometrically using either a glass electrode in combination with a reference potential or a combination electrode. The measuring device is calibrated using a series of standard solutions of known pH.

Method 9040 is used to measure the pH of aqueous wastes and those multiphase wastes where the aqueous phase constitutes at least 20% of the total volume of the waste. The corrosivity of concentrated acids and bases, or of concentrated acids and bases mixed with inert substances, cannot be measured. The pH measurement requires some water content.

SW-846 Online: Test Methods for Evaluating Solid Waste, Physical/Chemical Methods

(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:
See Chapter One for information.

Maximum Holding Time:
Samples should be analyzed as soon as possible.



None given.



Revision Number:

Analytical testing dots

Examples:  8260

Examples:  Dioxin
Analytical testing dots

<-- Search All Test Methods

Suggestions? The test methods page continues to expand and improve. If you have suggestions for improvement, we would enjoy hearing from you. Please contact the webmaster here.

Analytical testing dots