Direct vial surface sorbent micro extraction device and method
A device for extracting an analyte from a sample matrix comprises a sorption vial with a conically shaped interior surface, which is coated with a sorbent material. A method for extracting an analyte from a sample matrix includes retaining the sorption vial within a sample vessel with the sorbent coating exposed to the sample matrix contained in the sample vessel. After the analyte is collected in the sorbent material, the sorption vial may be removed from the sample vessel and sealed, or a small amount of elution solvent may be added to the sorption vial before sealing. The sorption vial containing the analyte may then be stored or transported to a lab for further analysis.
1. A device for the collection and extraction of at least one analyte within a sample, said device comprising:
a sorption vial including an interior surface, an opening to said interior surface and a closed vial base;
a sorptive coating on said interior surface;
a sample vessel for collecting said sample;
a cap for closing said sample vessel; and
said vial base removably attached to said cap, said cap retaining said sorption vial within said sample vessel during said collection and said extraction.
2. The device of claim 1 , further comprising:
said interior surface having a conical shape;
said conically-shaped interior surface having a vertex and a directrix;
said vertex proximate said vial base;
said directrix facing said opening.
3. The device of claim 1 , further comprising:
said interior surface including an interior wall and an interior base;
said interior base having a conical shape;
said conically-shaped interior base having a vertex and a directrix;
said vertex proximate said vial base;
said directrix contiguous with said interior wall; and
said sorptive coating covering said conically-shaped interior base.
4. The device of claim 3 , wherein said sorption vial comprises silica glass.
5. The device of claim 3 , further comprising:
said sorptive coating comprising an immobilized polysiloxane polymer having one type of functional group selected from the group consisting of alkyl, alkenyl, alkynyl, aryl, alkylaryl, alkenylaryl, alkynylaryl, haloalkyl and haloaryl.
6. The device of claim 3 , further comprising:
said sorptive coating comprising an immobilized polysiloxane polymer having at least two types of functional groups selected from the group consisting of alkyl, alkenyl, alkynyl, aryl, alkylaryl, alkenylaryl, alkynylaryl, haloalkyl and haloaryl.
7. The device of claim 3 , wherein said sorptive coating comprises an immobilized porous polymer.
8. The device of claim 7 , wherein said immobilized porous polymer is selected from the group consisting of: divinylbenzene, ethyleneglycoldimethacrylate, polyethyleneimine, acrylonitrile, n-vinyl-2-pyrollidinone, and 4-vinyl-pyridine.
9. The device of claim 3 , wherein said sorptive coating comprises a sol gel coating.
10. The device of claim 3 , wherein said sorptive coating is a polymer existing above its glass transition temperature.
11. The device of claim 3 , further comprising:
a vial cap for sealing said sorption vial; and
said vial cap covering said opening.
12. A device for the collection and extraction of at least one analyte within a sample, said device comprising:
a sorption vial including an interior wall, an interior base, an opening to said interior wall and said interior base and a vial base;
said interior base having a conical shape;
said conically-shaped interior base having a vertex and a directrix;
said vertex proximate said vial base;
said directrix contiguous with said interior wall;
a sorptive coating on said conically-shaped interior base;
a sample vessel for collecting said sample;
a cap for closing said sample vessel;
said vial base removably attached to said cap;
a vial cap for sealing said sorption vial; and
said vial cap covering said opening.
13. The device of claim 12 , further comprising:
said sorptive coating comprising an immobilized polysiloxane polymer having one type of functional group selected from the group consisting of alkyl, alkenyl, alkynyl, aryl, alkylaryl, alkenylaryl, alkynylaryl, haloalkyl and haloaryl.
14. The device of claim 12 , further comprising:
said sorptive coating comprising an immobilized polysiloxane polymer having at least two types of functional groups selected from the group consisting of alkyl, alkenyl, alkynyl, aryl, alkylaryl, alkenylaryl, alkynylaryl, haloalkyl and haloaryl.
15. The device of claim 12 , wherein said sorptive coating comprises an immobilized porous polymer.
16. The device of claim 15 , wherein said immobilized porous polymer is selected from the group consisting of: divinylbenzene, ethyleneglycoldimethacrylate, polyethyleneimine, acrylonitrile, n-vinyl-2-pyrollidinone, and 4-vinyl-pyridine.
17. The device of claim 12 , wherein said sorptive coating comprises a sol gel coating.
18. The device of claim 12 , wherein said sorptive coating is a polymer existing above its glass transition temperature.
19. A method for performing direct vial extraction of analytes from a sample utilizing a sorption vial and a sample vessel, said sorption vial including a closed vial base, a vial interior, and a vial opening, said method comprising:
coating said vial interior with a sorptive material;
removably attaching said closed vial base to a cap;
collecting a liquid sample in said sample vessel;
closing said sample vessel with said cap, said cap retaining said sorption vial within said sample vessel;
exposing said liquid sample to said sorptive coating;
opening said sample vessel;
removing said sorption vial from said cap;
adding a solvent to said sorption vial; and
sealing said sorption vial with a vial cap.
20. The method of claim 19 wherein said exposing step comprises agitating said sample vessel.
21. The method of claim 19 wherein said exposing step comprises subjecting said sorption vial to a headspace above said sample.
22. The method of claim 19 wherein said vial interior including a conically-shaped bottom surface; and
said coating step including coating said conically-shaped bottom surface with said sorptive coating.