EPA Method 218.1

ALS - Columbia offers EPA Method 218.1 testing at these laboratories:

Rochester Rochester, New York Laboratory

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EPA Method 218.1:
Chromium by Flame AA. Official Name: Chromium (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 chromium 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)

(A) Suppression: The suppression of chromium absorption in fuel-rich, air-acetylene flames is controlled by the addition of 1% ammonium bifluoride in 0.2% of sodium sulfate.(B) Metals: Chemical and matrix interferences from iron nickel and other metals can occur when using a fuel rich air acetylene flame.For additional interferences see EPA Method 200.0.

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

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



500-10,000 ug/L (optimal range); 250 ug/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

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Examples:  8260

Examples:  Dioxin
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