Mass Spectrometers Specifications on GlobalSpec

Help with Mass Spectrometers specifications:

Performance Specifications


	Mass Range:		A measure of the atomic mass range detected by the spectrometer in Atomic Mass Units. It may also be measured in Daltons.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Resolution (m/dm):		Resolution is the ratio of the mass divided by the change in mass over the area of two peaks. (m/dm)
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

	Mass Accuracy:
	Search Logic:		All matching products will have a value less than or equal to the specified value.

	Mass Spectrum:		Mass spectrum is obtained when ions (usually in a beam) are separated according to the mass-to-charge (m/z) ratios of the ionic species present. This plot is a graphical representation of m/z values versus measured ion abundance information.
	Search Logic:		All matching products will have a value less than or equal to the specified value.

Mass Spectrometer


	Mass Analyzer Design:		The part of the spectrometer that analyzes the process by which a mixture of ionic species is separated according to the mass-to-charge ratio (m/z). The analysis may be qualitative and/or quantitative.
	Your choices are...
	Time of Flight (TOF)		Time of Flight (TOF) instruments utilize the times taken by ions to pass (fly) along an evacuated tube as a means of measuring m/z values and therefore of obtaining a mass spectrum.
	Quadrupole		Quadrupole mass spectrometers consist of an ion source; ion optics to accelerate and focus the ions through an aperture into the quadrupole filter; the quadrupole filter itself, with control voltage supplies; an exit aperture, an ion detector, detection electronics, and a high-vacuum system.
	Ion Trap		Ion-trap mass spectrometers use three electrodes to trap ions in a small volume. The advantages of the ion-trap mass spectrometer include compact size and the ability to trap and accumulate ions to increase the signal-to-noise ratio of a measurement.
	Fourier Transform Cyclotron Resonance (FT-ICR)		Fourier-transform mass spectrometry takes advantage of ion-cyclotron resonance to select and detect ions.
	Magnetic Sector Analysis		With single focusing analyzers, a circular beam path of 180, 90, or 60 degrees can be used. The various forces influencing the particle separate ions with different mass-to-charge ratios. In double focusing analyzers, an electrostatic analyzer is added to separate particles with difference in kinetic energies.
	Other Type		Other unlisted, specialty or proprietary Mass Analyzer Design.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Ionization Method:
	Your choices are...
	Electrospray Ionization (ESI)		The electrospray ionization (ESI) source consists of a very fine needle and a series of skimmers. A sample solution is sprayed into the source chamber to form droplets. The droplets carry charge when the exit the capillary, and as the solvent evaporates, the droplets disappear leaving highly-charged analyte molecules. ESI is particularly useful for large biological molecules that are difficult to vaporize or ionize.
	Fast Atom Bombardment (FAB)		In fast atom bombardment (FAB), a high-energy beam of neutral atoms, typically Xe or Ar, strikes a solid or low-vapor-pressure liquid sample causing desorption and ionization. It is used for large biological molecules that are difficult to get into the gas phase. The sample is usually dispersed in a matrix such as glycerol. FAB causes little fragmentation and usually gives a large molecular ion peak, making it useful for molecular weight determination.
	Electron Impact Ionization (EI)		Electron impact ionization (EI) source uses an electron beam, usually generated from a tungsten filament, to ionize gas-phase atoms or molecules. An electron from the beam knocks an electron off of analyte atoms or molecules to create ions.
	Matrix-assisted Laser Desorption/Ionization (MALDI)		Matrix-assisted laser desorption/ionization (MALDI) is a LIMS method of vaporizing and ionizing large biological molecules, such as proteins or DNA fragments. The biological molecules are dispersed in a solid matrix such as nicotinic acid or dihydroxybenzoic acid. A UV laser pulse ablates the matrix that carries some of the large molecules into the gas phase in an ionized form so they can be extracted into a mass spectrometer.
	Other Method		Other unlisted, specialty or proprietary Ionization Method.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Detector Type:
	Your choices are...
	Channeltron		A channeltron is a horn-shaped, continuous dynode structure that is coated on the inside with an electron-emissive material. An ion striking the channeltron creates secondary electrons that have an avalanche effect to create more secondary electrons and finally a current pulse.
	Daly Detector		A Daly detector consists of a metal knob that emits secondary electrons when struck by an ion. The secondary electrons are accelerated onto a scintillator that produces light that is then detected by a photomultiplier tube.
	Electron Multiplier Tube (EMT)		Electron multiplier tubes (EMT) are similar in design to photomultiplier-tubes. They consist of a series of biased dynodes that eject secondary electrons when they are struck by an ion. They therefore multiply the ion current and can be used in analog or digital mode.
	Faraday Cup		A Faraday cup is a metal cup that is placed in the path of the ion beam. It is attached to an electrometer, which measures the ion-beam current. Since a Faraday cup can only be used in an analog mode, it is less sensitive than other detectors that are capable of operating in pulse-counting mode.
	Microchannel Plate		A microchannel plate (MCP) consists of an array of glass capillaries (10-25 µm inner diameters) that are coated on the inside with an electron-emissive material. The capillaries are biased at a high voltage and like the channeltron, an ion that strikes the inside wall one of the capillaries creates an avalanche of secondary electrons. This cascading effect creates a gain of 103 to 104 and produces a current pulse at the output.
	Other Detector		Other unlisted, specialty or proprietary Detector Type.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Sampling Specifications


	Sample Volume:		The maximum sample volume that the analyzer can accept.
	Search Logic:		All matching products will have a value less than or equal to the specified value.

	Flow Rate Range:		The rate at which the sample flows through the analyzer.
	Search Logic:		User may specify either, both, or neither of the "At Least" and "No More Than" values. Products returned as matches will meet all specified criteria.

Detector Interface


	Interfaces with a Gas Chromatograph (GC)?		An interface between a gas chromatograph and a mass spectrometer that provides continuous introduction of effluent gas from a gas chromatograph into a mass spectrometer ion source.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Interfaces with a Liquid Chromatograph (LC)?		An interface between a liquid chromatograph and a mass spectrometer that provides continuous introduction of effluent gas from a liquid chromatograph into a mass spectrometer ion source.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

User Interface Options


	Local Interface:
	Your choices are...
	Analog Front Panel		The panel has analog user inputs such as potentiometers, dials, switches, for adjustment of output, ranges, etc.
	Digital Front Panel		The panel uses digital keypads or menus for programming.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Computer Interface?		The spectrometer can be controlled or monitored remotely with a computer via interface.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Computer Interface Options:
	Your choices are...
	Serial Interface		Serial ports or interfaces can be used for serial communication, in which only one bit is transferred at a time. Examples include RS232, RS422, RS485, USB etc.
	Parallel Interface		Parallel interfaces are channels capable of transferring more than one bit at a time. Examples include PC printer ports, Centronics ports, etc.
	Other Computer Interface		Modem, transmitter, TTL, etc.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

	Application Software Included?		For control or for monitoring the process.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

Display Options


	Display Options:
	Your choices are...
	Analog Meter		Data is displayed with an analog meter or simple visual indicator.
	Digital Readout		Device uses numerical or application specific display.
	Video Display		The data is presented in video form via CRT, LCD, or other multi-line forms.
	None		No integral display. Output is read and displayed remotely.
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

Additional Output Options


	Additional Output Options:
	Your choices are...
	Outputs an Analog Voltage
	Output is a Pulse		Frequency or modulated frequency output (Ex. sine wave, pulse train, AM, FM).
	Outputs an Analog Current
	Output is a Switch or Relay Contact
	Search Logic:		All products with ANY of the selected attributes will be returned as matches. Leaving all boxes unchecked will not limit the search criteria for this question; products with all attribute options will be returned as matches.

General Features and Functionality


	Surface Analysis Capabilities?		Using SIMS or laser ablation, the spectrometer is used to analyze the surface of the chemicals in the sample.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Import/Export Capabilities?		Analyzer has the ability to export or import sample data.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Spectral Correction Equations?		Spectrometer has the integral ability to correct for variations in the spectrum generated due to stray light and other parameters.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Quantitative Analysis Capabilities?		The analyzer has the ability to quantify the gases present in the sample.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Self-Calibration?
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Extreme Environment?		For use in extreme environments.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Data Storage Options?		Detector has data storage options.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Portable		Portable spectrometers are modular devices that are designed for ease of transport and assembly. Rugged enclosures, PC interfaces, and customizable software packages are common features for the portable device.
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Programmable?
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

	Monitor, Alarm or Process Controller?
	Search Logic:		"Required" and "Must Not Have" criteria limit returned matches as specified. Products with optional attributes will be returned for either choice.

Environment


	Operating Temperature:		This is the full required range of ambient operating temperature.
	Search Logic:		User may specify either, both, or neither of the limits in a "From - To" range; when both are specified, matching products will cover entire range. Products returned as matches will meet all specified criteria.

Mass Spectrometers Specifications

Mass Range:

Resolution (m/dm):

Mass Accuracy:

Mass Spectrum:

Mass Analyzer Design:

Ionization Method:

Detector Type:

Sample Volume:

Flow Rate Range:

Interfaces with a Gas Chromatograph (GC)?

Interfaces with a Liquid Chromatograph (LC)?

Local Interface:

Computer Interface?

Computer Interface Options:

Application Software Included?

Display Options:

Additional Output Options:

Surface Analysis Capabilities?

Import/Export Capabilities?

Spectral Correction Equations?

Quantitative Analysis Capabilities?

Self-Calibration?

Extreme Environment?

Data Storage Options?

Portable?

Programmable?

Monitor, Alarm or Process Controller?

Operating Temperature:

Help with Mass Spectrometers specifications: