Remote analysis using aerosol sample transport

• US 20040002166A1
• Filed: 06/27/2002
• Published: 01/01/2004
• Est. Priority Date: 06/27/2002
• Status: Abandoned Application

• Current Assignee: Elemental Scientific Incorporated
• Original Assignee: Elemental Scientific Incorporated
• Inventors: Wiederin, Daniel R.
• Application Number:
  US10/184,198
• Publication Number:
  US 20040002166A1
• Time in Patent Office: Days
• US Class Current: 436/181
• CPC Class Codes: G01N 1/2202 involving separation of sample components during sampling
• CPC Class Codes: G01N 15/065 using condensation nuclei counters
• CPC Class Codes: G01N 2001/2223 aerosol sampling devices
• CPC Class Codes: G01N 2015/0681 Purposely modifying particles, e.g. humidifying for growing
• CPC Class Codes: Y10T 436/117497 with a continuously flowing sample or carrier stream
• CPC Class Codes: Y10T 436/25875 Gaseous sample or with change of physical state

Abstract

Systems and methods are disclosed that use a nebulizer for remote aerosol generation and then transport the aerosol by way of, for example, an argon gas stream through tubing. By transporting the chemical to be analyzed in aerosol form, transport time is reduced from about 30 minutes to less than one minute, using a relatively small amount of sample, and enabling the accurate, remote analysis of a variety of chemicals, including relatively high pH chemicals.

Claims

1. A remote chemical analysis system comprising:

a detector;

at least one remote nebulizer operable to provide an aerosolized sample to at least one length of aerosol transport tubing; and

the length of aerosol transport tubing operable to transport the aerosolized sample over a distance greater than approximately two meters to the detector.

2. The system according to claim 1 further including an aerosol switching valve in communication with the detector.

3. The system according to claim 1 further including a nebulizer selector operable to selectively enable the at least one remote nebulizer.

4. The system according to claim 1, wherein, the aerosolized sample includes wet aerosol.

5. The system according to claim 1, wherein, the aerosolized sample includes dry aerosol.

6. The system according to claim 1, wherein, the distance is less than approximately three hundred meters.

7. The system according to claim 1, wherein, the length of aerosol transport tubing is heated.

8. The system according to claim 1, wherein, the length of aerosol transport tubing is provided with anti-static properties.

9. The system according to claim 1, wherein, the length of aerosol transport tubing is coated with an anti-static film.

10. The system according to claim 1 further including a pre-condenser operable to condense a solvent associated with the aerosolized sample.

11. The system according to claim 1 further including a diluter.

12. The system according to claim 11, wherein, the diluter is operable to prevent back contamination.

13. The system according to claim 11, wherein, the diluter includes a syringe pump.

14. The system according to claim 13, wherein, the syringe pump is a PFA syringe pump.

15. The system according to claim 13, wherein, the syringe pump has flexible walls and a solid plunger.

16. The system according to claim 1 further including a calibration system operable to individually calibrate stations associated with at least one sample source.

17. The system according to claim 1 further including a spray chamber.

18. The system according to claim 1, wherein the detector is an ICP-MS instrument.

19. The system according to claim 1, wherein the detector is an ICP-AES instrument.

20. The system according to claim 1, wherein the detector is an electrospray mass spectrometer.

21. The system according to claim 1, wherein the detector is a flame.

22. The system according to claim 1, wherein the detector is an electrochemical detector.

23. A remote chemical analysis system comprising:

a detector;

at least one remote nebulizer operable to provide an aerosolized sample to at least one aerosol transport line;

the aerosol transport line operable to contain the aerosolized sample and to selectively transport the aerosolized sample over a distance greater than two meters through an aerosol manifold to the detector; and

a nebulizer controller operable to selectively enable the remote nebulizer to provide the aerosolized sample to the detector.

24. The system according to claim 23, wherein, the aerosolized sample includes wet aerosol.

25. The system according to claim 23, wherein, the aerosolized sample includes dry aerosol.

26. The system according to claim 23, wherein, the distance is less than approximately three hundred meters.

27. The system according to claim 23, wherein, the aerosol transport line is heated.

28. The system according to claim 23, wherein, the aerosol transport line is constructed from an anti-static material.

29. The system according to claim 28, wherein, the anti-static material includes a carbon filled polymer.

30. The system according to claim 23 further including a pre-condenser operable to condense a solvent associated with the aerosolized sample.

31. The system according to claim 23 further including a diluter.

32. The system according to claim 31, wherein, the diluter is operable to prevent back contamination.

33. The system according to claim 31, wherein, the diluter includes a syringe pump.

34. The system according to claim 33, wherein, the syringe pump is a PFA syringe pump.

35. The system according to claim 33, wherein, the syringe pump has flexible walls and a solid plunger.

36. The system according to claim 23 further including a calibration system operable to individually calibrate stations associated with at least one sample source.

37. The system according to claim 23 further including a spray chamber.

38. The system according to claim 23, wherein the detector is an ICP-MS instrument.

39. The system according to claim 23, wherein the detector is an ICP-AES instrument.

40. The system according to claim 23, wherein the detector is an electrospray mass spectrometer.

41. The system according to claim 23, wherein the detector is a flame.

42. The system according to claim 23, wherein the detector is an electrochemical spectrometer.

43. A remote chemical analysis system comprising:

a detector;

at least one remote nebulizer operable to provide an aerosolized sample to at least one aerosol transport line;

the aerosol transport line operable to contain the aerosolized sample and to transport the aerosolized sample over a distance greater than two meters through an aerosol control valve to the detector; and

a gas source operable to provide gas to the aerosol transport line to transport the aerosolized sample to the detector.

44. A method of remotely monitoring purity of a chemical, the method comprising:

receiving a sample of the chemical to analyze;

converting the sample to an aerosol;

transporting the aerosol through at least two meters of aerosol transport tubing to a detector; and

determining a concentration of at least one elemental contaminant in the chemical.

45. The method as set forth in claim 44 further comprising purging the aerosol from an aerosol manifold coupled with the aerosol transport tubing.

46. A remote auto-sampling system comprising:

means for extracting a sample of a chemical to analyze;

means for converting the sample into aerosol form, resulting in an aerosolized sample;

means for transporting the aerosolized sample through at least two meters of aerosol transport line to a means for analyzing the chemical; and

means for determining a concentration of trace elemental contaminants in the chemical.