EPA Method 242.1

EPA Method 242.1 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 242.1 (PDF File)

EPA Method 242.1:
Magnesium by Flame AA. Official Name: Magnesium (Atomic Absorption, Direct Aspiration)

A sample prepared according to EPA Method 200.0 is analyzed using a flame atomic absorption spectrometer. Specifications for instrument operation and preparation of standards are provided in the method.

This method determines magnesium by flame atomic absorption spectrometry. Sample pretreatment according to EPA Method 200.0 determines the applicability.

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

For interferences see EPA Method 200.0. Interference caused by aluminum at concentrations greater than 2 mg/L is masked by addition of lanthanum. Sodium, potassium, and calcium cause no interference at concentrations less than 400 mg/L.

QC Requirements:
QC requirements for drinking water procedures are provided in method 200.0

Maximum Holding Time:
6 months (MCAWW, Table 1).



0.02 - 0.5 mg/L (optimal range); 0.007 mg/L (sensitivity).

Sample Prep:

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

The DL is to be considered the minimum working limit achievable with this method.

Revision Number:
Issued 1971; Editorial Revision 1974 and 1978

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