Gas chromatography mass spectrometry gc ms

Introduction

Gas chromatography mass spectrometry, commonly abbreviated as GC-MS, is a powerful analytical technique that combines gas chromatography, which separates the components of a volatile mixture, with mass spectrometry, which identifies and quantifies each separated component by measuring its mass-to-charge ratio, and together they provide both separation and identification in a single analysis, making GC-MS one of the most versatile and widely used instruments in modern analytical chemistry. In the instrument, the sample is vaporized in a heated inlet and carried by an inert carrier gas, such as helium, through a chromatographic column, where the components are separated according to their different affinities for the stationary phase and emerge at different retention times; each separated component then enters the mass spectrometer, where it is ionized, typically by electron ionization, and the resulting ions are separated by mass and detected, producing a mass spectrum that serves as a fingerprint for the identification of the compound, while the abundance of each ion provides quantitative information, and the combination of retention time and mass spectrum allows unambiguous identification of even closely related compounds. GC-MS instruments consist of the gas chromatograph, the mass spectrometer, an interface, and a data system, and they can operate in scan mode for identification and in selected ion monitoring mode for high-sensitivity quantitative analysis, and modern benchtop instruments are compact, automated, and equipped with extensive spectral libraries for compound identification. GC-MS is used in environmental analysis for detecting pollutants, such as pesticides, herbicides, and persistent organic pollutants; in food safety for analyzing pesticide residues, additives, and contaminants; in pharmaceutical analysis for impurity profiling and drug testing; in clinical toxicology for drug and metabolite screening; in forensic science for analysis of drugs, explosives, and fire debris; and in the petrochemical and flavor and fragrance industries for product characterization. Features include high sensitivity, high resolution, large dynamic range, and powerful data processing and library search capabilities. With its unmatched combination of separation and identification power, GC-MS is an essential instrument in research, regulatory, and industrial laboratories worldwide.

Gas Chromatography Mass Spectrometry LGCS-T2010

Gas Chromatography Mass Spectrometry operates with a mass range of 15 to 550 amu, ensuring precise analysis. It features a portable design, weighing under 19 kg, allowing easy on-site us...

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Gas Chromatography Mass Spectrometry LGCS-T2011

Gas Chromatography Mass Spectrometry features a gas chromatography flow rate of 1 to 1.5 mL/min, enabling efficient sample separation. Its inlet temperature can reach up to 450 °C, whil...

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Standards

ISO 6974-Natural gas-Determination of composition with defined uncertainty by gas chromatography

USP General Chapter <621>-Chromatography

European Pharmacopoeia 2.2.46-Chromatographic separation techniques

WHO TRS 1025 Annex 4-Good chromatography practices

Complies with the above standards, but is not limited to them.

Features

1. Gas chromatography-mass spectrometry (GC-MS) system for compound separation and identification.

2. Combines GC separation with mass spectral detection for definitive compound identification.

3. Suitable for environmental, pharmaceutical, forensic, food, chemical and research laboratories.

4. Includes gas chromatograph, mass spectrometer, vacuum system and data analysis software.

5. Supports EI and CI ionization, full scan and SIM modes for qualitative and quantitative analysis.

FAQ

Q1: What testing scenarios is this GC-MS mainly applied to?

A: The GC-MS system is used in environmental monitoring, pharmaceutical quality control, forensic science, food safety testing, chemical analysis, fragrance research and clinical laboratories to separate, identify and quantify volatile and semi-volatile compounds with high sensitivity and specificity. It supports environmental pollutant analysis (dioxins, PCBs, pesticides, VOCs), pharmaceutical residual solvent and impurity testing, forensic toxicology and drug analysis, food safety testing (contaminants, flavor compounds, allergens), chemical product characterization, fragrance and essential oil profiling, and clinical biomarker analysis. The mass spectrometer provides definitive compound identification through mass spectral libraries and molecular weight information, making it the gold standard for confirmatory analysis. It is essential for regulatory, forensic, environmental, pharmaceutical and research laboratories requiring definitive compound identification and quantification for compliance testing, forensic investigation, environmental monitoring, drug development, food safety and research, where the combination of chromatographic separation and mass spectral detection provides unmatched confidence in compound identification for complex sample matrices in analytical, regulatory and scientific applications.

Q2: What standards does the GC-MS comply with?

A: The GC-MS supports methods referenced in EPA methods for environmental analysis, USP/EP/ChP monographs for pharmaceuticals, ASTM methods, ISO and GB/T standards, and forensic laboratory standards. The hardware complies with IEC 61010 laboratory safety standards. Electronic records may be configured for 21 CFR Part 11 compliance. Mass calibration uses perfluorotributylamine (PFTBA) or similar reference compounds.

Q3: What is the warranty period for the whole machine and key components?

A: The whole GC-MS system including GC, MS, vacuum system and electronics is covered by a 12-month warranty. Columns, liners, septa, filaments and electron multipliers are consumables excluded from warranty. Damage from improper vacuum, gas supply or unauthorized repair is excluded. Extended service contracts are strongly recommended for this high-value, complex instrument.

Q4: Is this device difficult to operate? Is professional training required?

A: GC-MS operation requires specialist training in chromatography, mass spectrometry, vacuum systems and data interpretation. We provide comprehensive training, operation manuals and application support. Proper method development, mass calibration, tuning, library searching and result interpretation are essential for quality GC-MS analysis.

Q5: What is the typical lead-time for order delivery?

A: Standard models require 7-30 working days. In-stock units can ship within 3-7 working days. Custom configurations or large built-to-order systems may require additional time, and we confirm the exact schedule before order confirmation.

Q6: Is regular calibration required? What is the recommended calibration cycle?

A: Mass calibration and tuning (autotune) recommended daily or before each analytical batch per method requirements. Detector calibration with certified standards per method. GC inlet and column maintenance per usage. Vacuum system performance monitored regularly. Full system performance verification annually. Routine system suitability before each batch for regulated work.

Q7: Are supporting consumables universal?

A: Columns, liners, septa, filaments, electron multipliers and calibration standards are available from multiple qualified suppliers, though instrument-specific MS parts should be sourced from the manufacturer or authorized distributor. Carrier and detector gases require high purity. Long-term consumable and service cost is significant for this complex instrument.

Q8: Can I customize parameters or supporting accessories?

A: Customization includes MS analyzer type (quadrupole, ion trap, TOF), ionization mode, GC configuration, autosampler, vacuum system and software modules. Custom orders require detailed application specification and extend lead-time. Users should define target analytes, matrices, sensitivity requirements, throughput and regulatory requirements before configuration.

Q9: Does the purchase include on-site installation and commissioning service?

A: Yes, GC-MS systems include on-site installation, commissioning, mass calibration, performance verification and comprehensive operator training by certified GC-MS specialists. Site preparation guidance is provided well before delivery to ensure power, gas supply, exhaust, environmental and safety requirements are met.

Q10: What types of samples are compatible with this equipment?

A: The GC-MS analyzes volatile and semi-volatile organic compounds in liquid, gas and solid samples (after extraction) within the GC and MS capabilities. Non-volatile or thermally labile compounds require LC-MS instead. Samples should be clean, properly prepared and free of non-volatile residues that can contaminate the source. Users should select appropriate column and ionization mode, perform regular autotune and mass calibration, use high-purity gases, maintain the vacuum system, calibrate with certified standards, perform library searching with quality criteria, verify system suitability, and follow proper sample preparation including extraction and clean-up for complex matrices. The instrument should be allowed adequate pump-down and warm-up time before analysis.