NOAA NST: 130.31: Organic contaminants in marine animal tissues by GC-MS
Official Method Name
|
Gas chromatography mass spectrometry (GC-MS) analysis for organic contaminates in marine animal tissues. |
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Current Revision
| March 1998 |
Media
|
ANIMAL TISSUE |
Instrumentation
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Gas Chromatography with Mass Spectrometry Detection |
Method Subcategory
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Organic |
Method Source
|
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Citation
|
Sampling and Analytical Methods of the National Status and Trends Program Mussel Watch Project: 1993-1996 Update. NOAA Technical Memorandum NOS ORCA 130. March 1998. Silver Spring, MD. 233pp. |
Brief Method Summary
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Polycyclic aromatic hydrocarbons (PAH), PCDDs, and PCDFs can be determined at low concentrations by mass spectrometry due to their strong molecular ion response. Therefore, GC/MS in the selected ion monitoring mode provides unambiguous and sensitive detection for these compounds. Also the availability of labeled surrogates internal standards of many of the analytes makes very accurate determinations of analyte concentrations possible. Quantitation is performed by gas chromatography mass spectrometry (GC/MS) in the selected ion monitoring (SIM) mode. Silica gel/alumina cleanup with activated copper is used to remove interfering materials from the sample prior to analysis. |
Scope and Application
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The quantitative method described in this document was used to determine polycyclic aromatic hydrocarbons (PAH) and their alkylated homologues in extracts of marine animal tissue. |
Applicable Concentration Range
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1 - 1000 ng / g |
Interferences
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Method interferences may be caused by contaminants in solvents, reagents, glassware, and other sample processing hardware, and lead to false positives during instrumental analysis. All materials used in this method are routinely demonstrated to be free from interferences by processing procedural blanks identical to samples (one blank per 20 samples or each batch whichever is more frequent). Matrix interferences result from co-extraction of compounds other than the analytes of interest. Elemental sulfur and naturally occurring lipids can cause interferences in the analysis of tissue extracts. |
Quality Control Requirements
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The quality assurance / quality control requirements are as follows: Method blank. Laboratory blank spike. Ongoing precision and recovery analyses. Matrix spike. Duplicates. Reference material (NIST SRM 1944) analyses. Labeled compound recovery. |
Sample Handling
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Tissue is collected and stored in precleaned glass jars and stored frozen (-20 C). Extracts are stored in the dark at or below 4 C. |
Maximum Holding Time
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6 months (frozen) |
Relative Cost
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Greater than $400 |
Sample Preparation Methods
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NOAA TM #130 |