Method 7027

Cobalt and Compounds (as Co) by AA

This method is used for the determination of cobalt and compounds as cobalt. The sample is collected on cellulose ester membrane filters, ashing: aqua regia @ 140 °C, concentrated nitric acid @ 140 °C, room temperature 30 min,140 °C to near dryness, and then analyzed by flame atomic absorption. The working range is 0.01 to 0.3 mg/m³ for a 300 L sample. This is an elemental analysis and not compound specific. Verify that the types of compounds in the samples are soluble with this ashing procedure. Aliquots of samples can be analyzed separately for approximately four additional methods. NOTE: This method combines and replaces P&CAM 173, S203 for cobalt. Method 7300 (elements by ICP-AES) is an alternate analytical technique.

(NIOSH Issue 2: 15 August 1994)


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Method Data

Hold Times, Preservatives, Preps, Collection, Analytical & Documentation
Holding Time:   Stable
Preservatives:   Stable
Required Preps:   Cellulose ester membrane filter (0.8µm pore size).
Collection Method:   Filter: 30L - 1500L @ 1 to 3 L/min.
Analytical Methodology:   Flame Atomic Absorption.
Documentation:   7027

Analyte List*

Analyte Formula CAS Number Detection Limit

* The analytes and detection limits listed for each method represent the typical detection limits and analytes reported for that particular method. Keep in mind that analyte lists may vary from laboratory to laboratory. Detection limits may also vary from lab to lab and are dependent upon the sample size, matrix, and any interferences that may be present in the sample.