EPA Method 365.4


EPA Method 365.4 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 365.4 (PDF File)


EPA Method 365.4:
Phosphorus by Automated Colorimetry. Official Name: Phosphorus, Total (Colorimetric, Automated, Block Digestor AA II)

Summary:
The sample is heated in the presence of sulfuric acid, potassium sulfate, and mercuric sulfate for two and one half hours. The residue is cooled and diluted to 25 mL and placed in autoanalyzer for determination of phosphorus by colorimetry.

Scope:
This method determines total phosphorus in drinking water, surface water; domestic and industrial wastes.

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

Interferences:
None provided.

QC Requirements:
None.

Maximum Holding Time:
48 hours (orthophosphate, dissolved)28 days (Hydrolyzable and Total)24 hours (Total Dissolved).(MCAWW, Table 1).

Media:
WATER

Subcategory:
Inorganic

Concentration:
0.01 to 20 mg P/L

Sample Prep:
None.

Precision:
Precision and accuracy values were calculated using interlaboratory data from EPA-managed Water Pollution (WP) performance evaluation studies.

Detection:
None.

Revision Number:
Issued 1974

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