Standard Practice for the Solid Phase Micro Extraction (SPME) of Water and its Headspace for the Analysis of Volatile and Semi-Volatile Organic Compounds

Importancia y uso:

5.1 This practice provides a general procedure for the solid phase micro extraction of volatile and semi-volatile organic compounds from an aqueous matrix or its headspace. Solid sorbent extraction is used as the initial step in the extraction of organic constituents for the purpose of quantifying or screening for extractable organic compounds.

5.2 Typical detection limits that can be achieved using SPME techniques with gas chromatography with flame ionization detector (FID), electron capture detector (ECD), or with a mass spectrometer (MS) range from mg/L to μg/L. The detection limit, linear concentration range, and sensitivity of the test method for a specific organic compound will depend upon the aqueous matrix, the fiber phase, the sample temperature, sample volume, sample mixing, and the determinative technique employed.

5.3 SPME has the advantages of speed, no desorption solvent, simple extraction device, and the use of small amounts of sample.

5.3.1 Extraction devices vary from a manual SPME fiber holder to automated commercial device specifically designed for SPME.

5.3.2 Listed below are examples of organic compounds that can be determined by this practice. This list includes both high and low boiling compounds.

Volatile Organic Compounds (1-3)3

Pesticides, General (4, 5)

Organochlorine Pesticides (6)

Organophosphorous Pesticides (7, 8)

Polyaromatic Hydrocarbons (9, 10)

Polychlorinated Biphenyls (10)

Phenols (11)

Nitrophenols (12)

Amines (13)

5.3.3 SPME may be used to screen water samples prior to purge and trap extraction to determine if dilution is necessary, thereby eliminating the possibility of trap overload.

Subcomité:

D19.06

Referida por:

D6889-03R24

Volúmen:

11.02

Número ICS:

13.060.50 (Examination of water for chemical substances)

Palabras clave:

extraction; sample preparation; semi-volatile; solid phase micro extraction (SPME); volatile; water;