EPA Method 360.2


EPA Method 360.2 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 360.2 (PDF File)


EPA Method 360.2:
Dissolved Oxygen Using a Modified Winkler Method. Official Name: Oxygen, Dissolved (Modified Winkler, Full-Bottle Technique)

Summary:
The sample is treated with manganous sulfate, potassium hydroxide and potassium iodide, and finally sulfuric acid. The initial precipitate of manganous hydroxide combines with the dissolved oxygen in the sample to form a brown precipitate, manganic hydroxide. Upon acidification, the manganic hydroxide forms manganic sulfate which acts as an oxidizing agent to release free iodine from potassium iodide. The iodine, which is stoichiometrically equivalent to the dissolve oxygen in the sample is then titrated with sodium thiosulfate of phenylarsine oxide.

Scope:
This method determines dissolved oxygen in most wastewaters and streams that contain nitrate nitrogen and not more than 1 mg/L of ferrous iron.

Citation:
Methods for the Chemical Analysis of Water and Wastes (MCAWW) (EPA/600/4-79/020)

Interferences:
Chemical Agents: Oxidizing and reducing agents, nitrate ion, ferrous iron, and organic matter could effect test results. Modifications to the original Winkler procedure have overcome many interferences. In addition, the dissolved oxygen probe (EPA Method 360.1) is an alternative procedure which is subject to less interferences.

QC Requirements:
None.

Maximum Holding Time:
8 hours (preserved) (MCAWW, Table 1).

Media:
WATER

Subcategory:
Inorganic

Concentration:
Not Available.

Sample Prep:
None.

Precision:
Precision and accuracy data are not available.

Detection:
None.

Revision Number:
Issued 1971

Test Description:
Oxygen, Dissolved -

Report Number:
600/4-79-020

Analytical testing dots


Examples:  8260
TO-15

Examples:  Dioxin
Mercury
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