Abstract: The present invention relates to a method of improving detection sensitivity of an ion mobility spectrometer, comprising: inserting a sample into a sample receiving device of the ion mobility spectrometer; triggering an operation of spectra acquisition through an optocoupler; when the number of the acquired spectra reaches the level required to contain enough information for accurate detection of explosives with relatively high vapor pressure, adding a dopant instantly to the ionization region by controlling the ON/OFF-state of an electromagnetic valve; when the number of the acquired spectra reaches the level required to contain enough information for accurate detection of explosives with relatively low vapor pressure, stopping the acquisition operation, and turning off the electromagnetic valve so as to stop adding the dopant to the ionization region; analyzing all of the acquired spectra to obtain the detection result.

Abstract: Disclosed is a sampling method which comprises the steps of: blowing airflow towards a center portion of a sampling surface through a blowing port; and sucking the blown airflow from periphery of the sampling surface through a sucking port, or a sampling method which comprises the steps of: providing a sampling device on a sampling surface, the sampling device being shaped to form a sampling space together with the sampling surface, and the sampling device including a blowing port arranged at the center portion of the sampling device and a sucking port arranged at periphery of the sampling device; blowing airflow towards the sampling surface through the blowing port; and sucking the airflow blown towards the sampling surface through the sucking port so as to collect samples.

Abstract: A sampling component including a sampling body that can be electrically heated and an outer surface of which has a wiping sampling area to receive a sample; and an insulated handle that is connected to one longitudinal end of the sampling body. The sampling component contacts directly electrical contacts of an external power supply after being positioned in a analysis chamber, the power supply is turned on to vaporize the sample, and the power is turned off immediately after the sampling component removed from the chamber. The power consumption and a malfunction caused by long-term use of the sampling device under a high temperature can be avoided. A sampling device having the sampling component and an ion mobility spectrometer having the sampling device are also provided.

Abstract: A trace detector is disclosed. The trace detector comprises: a desorption chamber defining a desorption region, and the desorption chamber has a housing. The housing has a sample feeding port for introducing a substance to be detected into the desorption chamber and a gas discharge port for discharging gas entraining the sample from the desorption chamber. A controller is used for controlling the trace detector in such a manner that the sample feeding port and the gas discharge port are in fluid communication with the desorption chamber during pre-concentration process of the trace detector, thereby continuously feeding and collecting the sample. With the above manner, data collecting, processing and analyzing processes may be performed by the trace detector throughout the sample feeding process and the gas pre-concentrating process.

Abstract: The present invention discloses a sampling device for an ion migration spectrometer (IMS), comprising: an inner sleeve part, inside of which an inner cavity is defined, one end of the inner sleeve part is connected with an inlet of an migration pipe via an inner-layer channel, and the other end of the inner sleeve part is configured with an inner end cap having an inner opening; and an outer sleeve part, which is configured as an eccentric sleeve that is coaxial with the inner sleeve part and able to rotate with respect to the inner sleeve part, so as to form a sleeve cavity between the inner sleeve part and the outer sleeve part, wherein one end of the outer sleeve part is configured with at least one connecting opening that is selectively connected with the inner-layer channel, and the other end of the outer sleeve part is configured with an outer end cap, on which a first outer opening selectively connected with the inner opening and a second outer opening selectively connected with the sleeve cavity are c

Abstract: The present invention discloses a sampling device for an ion migration spectrometer (IMS), comprising: an inner sleeve part, inside of which an inner cavity is defined, one end of the inner sleeve part is connected with an inlet of an migration pipe via an inner-layer channel, and the other end of the inner sleeve part is configured with an inner end cap having an inner opening; and an outer sleeve part, which is configured as an eccentric sleeve that is coaxial with the inner sleeve part and able to rotate with respect to the inner sleeve part, so as to form a sleeve cavity between the inner sleeve part and the outer sleeve part, wherein one end of the outer sleeve part is configured with at least one connecting opening that is selectively connected with the inner-layer channel, and the other end of the outer sleeve part is configured with an outer end cap, on which a first outer opening selectively connected with the inner opening and a second outer opening selectively connected with the sleeve cavity are c

Abstract: The present invention relates to a method of improving detection sensitivity of an ion mobility spectrometer, comprising: inserting a sample into a sample receiving device of the ion mobility spectrometer; triggering an operation of spectra acquisition through an optocoupler; when the number of the acquired spectra reaches the level required to contain enough information for accurate detection of explosives with relatively high vapor pressure, adding a dopant instantly to the ionization region by controlling the ON/OFF-state of an electromagnetic valve; when the number of the acquired spectra reaches the level required to contain enough information for accurate detection of explosives with relatively low vapor pressure, stopping the acquisition operation, and turning off the electromagnetic valve so as to stop adding the dopant to the ionization region; analyzing all of the acquired spectra to obtain the detection result.

Abstract: A hand-held sampling apparatus used for an ion mobility spectrometer and method of obtaining a sample are provided to prevent deformation of sampling wipes when detecting explosives and drugs. The apparatus has a body comprising a handle in the rear portion and a wiping sampling mechanism in the front portion, with a wiping surface located on its underside. The sampling wipe can be in full contact with the surface of the object during wiping to improve wiping efficiency. Correspondingly, a smaller sample inlet port can be disposed on the analyzer so as to save a large amount of sampling wipes. and meanwhile avoid sampling wipes from deformation and folds hard to restore, thereby ensuring subsequent sample insertion operation, enhancing the efficiency of both sample collection and sample injection and improving the detection performance for the analytes to be detected.

Abstract: The present invention discloses a sampling component comprising a sampling body that can be electrically heated and the outer surface of which has a wiping sampling area; and an insulated handle that is connected with one longitudinal end of the sampling body. The sampling component according to the present invention contacts directly the contacts of an external power supply after being disposed in a analysis chamber, the power supply is turned on to heat the sampling body so as to realize sample pyrolysis, and the power is turned off immediately after the sampling component is taken away. Thus, the power supply of the sampler can work discontinuously so that the power consumption of the system is reduced, meanwhile, the system malfunction caused by a long-term work of the sampling device under a high temperature can be avoided. The present invention further discloses a sampling device having said sampling component and an ion mobility spectrometer having the sampling device.

Abstract: A trace detector is disclosed. The trace detector comprises: a desorption chamber defining a desorption region, and the desorption chamber has a housing. The housing has a sample feeding port for introducing a substance to be detected into the desorption chamber and a gas discharge port for discharging gas entraining the sample from the desorption chamber. A controller is used for controlling the trace detector in such a manner that the sample feeding port and the gas discharge port are in fluid communication with the desorption chamber during pre-concentration process of the trace detector, thereby continuously feeding and collecting the sample. With the above manner, data collecting, processing and analyzing processes may be performed by the trace detector throughout the sample feeding process and the gas pre-concentrating process.

Abstract: Disclosed is a sampling method which comprises the steps of: blowing airflow towards a center portion of a sampling surface through a blowing port; and sucking the blown airflow from periphery of the sampling surface through a sucking port, or a sampling method which comprises the steps of: providing a sampling device on a sampling surface, the sampling device being shaped to form a sampling space together with the sampling surface, and the sampling device including a blowing port arranged at the center portion of the sampling device and a sucking port arranged at periphery of the sampling device; blowing airflow towards the sampling surface through the blowing port; and sucking the airflow blown towards the sampling surface through the sucking port so as to collect samples.

Abstract: The present invention relates to a gas filtering-buffering device, which comprises at least one gas filtering unit; a gas inlet, the gas to be processed flows into the at least one gas filtering unit from the gas inlet; and a gas outlet, the gas processed by the at least one gas filtering unit is discharged out of the at least one gas filtering unit via the gas outlet, wherein the at least one gas filtering unit comprising: a gas buffering cavity for performing buffering function for the gas, and a gas filtering part for performing filtering function for the gas. In the present invention, it is not only provided with a gas filtering part which is able to filter the moisture and organic substance in the gas, but also provided with a gas buffering cavity, which integrate the filtering and buffering functions together.

Abstract: A hand-held sampling apparatus used for an ion mobility spectrometer and method of obtaining a sample are provided to prevent deformation of sampling wipes when detecting explosives and drugs. The apparatus has a body comprising a handle in the rear portion and a wiping sampling mechanism in the front portion, with a wiping surface located on its underside. The sampling wipe can be in full contact with the surface of the object during wiping to improve wiping efficiency. Correspondingly, a smaller sample inlet port can be disposed on the analyzer so as to save a large amount of sampling wipes. and meanwhile avoid sampling wipes from deformation and folds hard to restore, thereby ensuring subsequent sample insertion operation, enhancing the efficiency of both sample collection and sample injection and improving the detection performance for the analytes to be detected.

Abstract: The present invention relates to a gas filtering-buffering device, which comprises at least one gas filtering unit; a gas inlet, the gas to be processed flows into the at least one gas filtering unit from the gas inlet; and a gas outlet, the gas processed by the at least one gas filtering unit is discharged out of the at least one gas filtering unit via the gas outlet, wherein the at least one gas filtering unit comprising: a gas buffering cavity for performing buffering function for the gas, and a gas filtering part for performing filtering function for the gas. In the present invention, it is not only provided with a gas filtering part which is able to filter the moisture and organic substance in the gas, but also provided with a gas buffering cavity, which integrate the filtering and buffering functions together.