Methods and devices for moisture-based calibration

Patent metadata

Field	Value
Publication number	US-2018172635-A1
Application number	US-201615379834-A
Country	US
Kind code	A1
Filing date	Dec 15, 2016
Priority date	Dec 15, 2016
Publication date	Jun 21, 2018
Grant date	—

Abstract

The present disclosure is directed to methods and devices for moisture-based calibration. In particular, the present disclosure is directed to moisture monitoring devices that trigger calibration of substance detection devices.

First claim

What is claimed is:

1 . A substance detection device comprising:
an inlet for receiving a sample to be tested for the presence of at least one substance of interest; an ionization chamber; a drift chamber; and, at least one moisture sensor.

2 . The substance detection device of claim 1 , further comprising at least one of a dryer, an ion collector, a doping chamber, a plumbing system, a gas line in flow communication with a dryer, a gas line in flow communication with a doping chamber, and an exhaust outlet.

3 . The substance detection system of claim 2 , wherein the at least one moisture sensor is located in at least one of the inlet, the drift chamber, the ionization chamber, the dryer, the ion collector, the doping chamber, the plumbing system, the gas line in flow communication with the dryer, the gas line in flow communication with the doping chamber, and the exhaust outlet.

4 . The substance detection device of claim 1 , further comprising at least one pre-determined detection library.

5 . The substance detection system of claim 1 , wherein the device includes at least one of an ion mobility spectrometer (IMS), an ion trap mobility spectrometer (ITMS), a drift spectrometer (DS), a non-linear drift spectrometer, a field ion spectrometer (FIS), a radio frequency ion mobility increment spectrometer (IMIS), a field asymmetric ion mobility spectrometer (FAIMS), an ultra-high-field FAIMS, a differential ion mobility spectrometer (DIMS) and a differential mobility spectrometer (DMS), a traveling wave ion mobility spectrometer, a semiconductor gas sensor, a raman spectrometer, a laser diode detector, a mass spectrometer (MS), an electron capture detector, a photoionization detector, a chemiluminescence-based detector, an electrochemical sensor, an infrared spectrometer, a lab-on-a-chip detector and combinations thereof.

6 . A method for calibrating a substance detection device, the method comprising:
measuring a moisture content within a substance detection device; reporting the moisture content; and, performing a calibration, wherein the calibration adjusts at least one of a mobility value, a drift time value and a compensation voltage of at least one substance of interest.

7 . The method of claim 6 , wherein performing the calibration occurs when the moisture content is greater than about 5 ppm.

8 . The method of claim 6 , wherein performing the calibration occurs when the moisture content is from about 5 ppm to about 5,000 ppm.

9 . The method of claim 6 , wherein the moisture content is measured with at least one moisture sensor located within the substance detection device.

10 . The method of claim 6 , wherein the calibration is performed by inserting a sample into the substance detection device, measuring any movement of the at least one mobility value and the drift time value of the sample, and adjusting the at least one mobility value and drift time value of the substance of interest by the amount of movement measured.

11 . The method of claim 6 , wherein the substance detection device includes at least one of an ion mobility spectrometer (IMS), an ion trap mobility spectrometer (ITMS), a drift spectrometer (DS), a non-linear drift spectrometer, a field ion spectrometer (FIS), a radio frequency ion mobility increment spectrometer (IMIS), a field asymmetric ion mobility spectrometer (FAIMS), an ultra-high-field FAIMS, a differential ion mobility spectrometer (DIMS) and a differential mobility spectrometer (DMS), a traveling wave ion mobility spectrometer, a semiconductor gas sensor, a raman spectrometer, a laser diode detector, a mass spectrometer (MS), an electron capture detector, a photoionization detector, a chemiluminescence-based detector, an electrochemical sensor, an infrared spectrometer, a lab-on-a-chip detector and combinations thereof.

12 . A method for detecting a substance of interest, the method comprising:
collecting a sample of a substance of interest; inserting the sample of the substance of interest into a substance detection device, wherein the device comprises an inlet for receiving a sample to be tested for the presence of at least one substance of interest; an ionization chamber; a drift chamber; and, at least one moisture sensor; measuring a moisture content within the device; reporting the moisture content; comparing at least one of a mobility value, a drift time value and a compensation voltage of the substance of interest to a pre-determined mobility value, drift time value or compensation voltage; and, identifying the substance of interest.

13 . The method of claim 12 , wherein the pre-determined mobility value, drift time value or compensation voltage is located in at least one pre-determined detection library.

14 . The method of claim 13 , wherein the pre-determined mobility value, drift time value or compensation voltage is located in one of three different pre-determined detection libraries.

15 . The method of claim 14 , wherein the first detection library is used for comparison when the moisture content of the substance detection device is from about 5 ppm to about 50 ppm.

16 . The method of claim 14 , wherein the second detection library is used for comparison when the moisture content of the substance detection device is from about 50 ppm to about 500 ppm.

17 . The method of claim 14 , wherein the third detection library is used for comparison when the moisture content of the substance detection device is from about 500 ppm to about 5,000 ppm.

18 . The method of claim 12 , wherein the substance detection device includes at least one of an ion mobility spectrometer (IMS), an ion trap mobility spectrometer (ITMS), a drift spectrometer (DS), a non-linear drift spectrometer, a field ion spectrometer (FIS), a radio frequency ion mobility increment spectrometer (IMIS), a field asymmetric ion mobility spectrometer (FAIMS), an ultra-high-field FAIMS, a differential ion mobility spectrometer (DIMS) and a differential mobility spectrometer (DMS), a traveling wave ion mobility spectrometer, a semiconductor gas sensor, a raman spectrometer, a laser diode detector, a mass spectrometer (MS), an electron capture detector, a photoionization detector, a chemiluminescence-based detector, an electrochemical sensor, an infrared spectrometer, a lab-on-a-chip detector and combinations thereof.

19 . A method for servicing a substance detection device, the method comprising:
measuring a moisture content within a substance detection device, wherein the device includes at least one moisture sensor; and, servicing the substance detection device.

20 . The method of claim 19 , wherein servicing the substance detection device includes lowering the moisture content within the device.

21 . The method of claim 19 , wherein the moisture content within the device is greater than about 5,000 ppm.

22 . The method of claim 19 , wherein the substance detection device includes at least one of an ion mobility spectrometer (IMS), an ion trap mobility spectrometer (ITMS), a drift spectrometer (DS), a non-linear drift spectrometer, a field ion spectrometer (FIS), a radio frequency ion mobility increment spectrometer (IMIS), a field asymmetric ion mobility spectrometer (FAIMS), an ultra-high-field FAIMS, a differential ion mobility spectrometer (DIMS) and a differential mobility spectrometer (DMS), a traveling wave ion mobility spectrometer, a semiconductor gas sensor, a raman spectrometer, a laser diode detector, a mass spectrometer

Assignees

• Rapiscan Systems Inc

Inventors

• Lai Hanh T
• Platow Wilhelm P

Classifications

• H01J49/0031

  Step by step routines describing the use of the apparatus (H01J49/0081 takes precedence) · CPC title

• H01J49/0009

  Calibration of the apparatus · CPC title

• G01N27/622 Primary

  Ion mobility spectrometry · CPC title