GC Detectors
- Auto Gain with the Pulsed Flame Photometric Detector (PFPD)
- Primer on Flame Ionization Detectors (FID)
- PFPD Tuning App
- Pulsed Flame Photometric Detector (PFPD) Equimolar Responses for Sulfur Analytes
- ECD Licensing Bruker 450-430
- ECD Licensing Scion 456-436
- ECD Licensing Varian 3800
- Operating Parameters for TCD – 436-456
Biogas and Biomethane
- Calibration Standards for Measurement of Toxic Organics in Biomethane Using Permeation Tubes
- Calibration Standards for Measurement of Volatile Siloxanes
- Measurement of Toxic Organic Compounds in Biogas and Biomethane by GCMS
- Online, Direct Measurement of Volatile Siloxanes in Anaerobic Digester and Landfill Gases
- Toxic Organics in Biomethane Analyzer
Hydrocarbons
- Determination of Hydrocarbons in Diesel Exhaust
- Identification of Hydrocarbons in Ambient Air
- List of Kovats Indices Alumina PLOT
- List of Kovats Indices for C2-C13 Hydrocarbons
- Peak Assignments for C2-C9 Hydrocarbons in Vehicle Exhaust with Varian Alumina-KCl PLOT Capillary Column
- Peak Assignments for C2-C13 Hydrocarbons in Ambient Air
- Peak Assignments for C2-C13 Hydrocarbons in Vehicle Exhaust
- Quantitation of Hydrocarbons in Vehicle Exhaust and Ambient Air
- Using Kovats Indices
- Validating Instrument Performance for Measurement of Hydrocarbons in Ambient Air
- Naphthalene in Ambient Air by GC-MS-MS Detection
- Measurement of Acrylonitrile , Acetonitrile and Nitromethane in Ambient Air and Vehicle Exhaust
- Oxygenates in Gasoline Analyzer
- Nat Gas Brochure. 436
- System Design of the Hydrocarbon Measurement System – 456
Non-Methane Organic Compounds (NMOC)
- Novel Approach to Measuring Non-Methane Organic Compounds (NMOC) with Cryo-Trapping
- Performance of a Non-Methane Organic Compound Analyzer – EPA Method 25 and South Coast AQMD Method 25.3
- Methd 25 Determination of Total Gaseous Nonmethane Orgnic Emissions as Carbon
Greenhouse Gases
- A Precise Gas Chromatographic Method Using ECD Detection for the Measurement of Nitrous Oxide in Vehicle Exhaust
- Measurement of Carbon Dioxide, Methane, Nitrous Oxide, Sulfur Hexafluoride and Halocarbons in Ambient Air at an Industrial Park in Huntington Beach, California
- Method for the Determination of Nitrous Oxide in Ambient Air and Vehicle Exhaust
- Optimum Parameters for Detection of Long-Lived Green House Gases in Ambient Air
- Measurement of Hydrofluorocarbons, Perfluorocarbons and Chlorofluorocarbons in Ambient Air by Gas Chromatography and Mass Spectrometry
TO15 Toxic Analytes
- A Case Against Using Internal Standards for EPA Method TO-15
- Evaluating Performance of Measurement Systems Configured for TO-15 Toxic Organics in Ambient Air and Other Bulk Gases
- Extremely Wide Concentration Ranges for Toxic Analytes in Air with Lotus Consulting TO15 Analyzer and Scion SQ Mass Spectrometer
- Peak Assignment for TO15 Analytes with Varian CP624 Column
- Performance of the Varian 240 Ion Trap Mass Spectrometer in the Measurement of Volatile Organic Compounds by EPA Method TO-15 (2)
- Peak Assignment for TO15 Analytes with Restek 624 Column and Air Scion SIM Mode
- Cautions with Sample Loadings with TO15 Analyzers
General Chromatography
- Concentration Units in Gas Analysis
- Effectiveness of EFC in Gas Chromatography
- Effects of Temperature and Pressure on Sample Loop Volume in Gas Analysis
- Mass Flow Controllers and Carbon Dioxide
- Preprogrammed Monitoring of System Performance
- Primer on Temperature Control and Monitoring in Gas Chromatography
- Ultimate Performance in Gas Chromatography
- Unintended Consequences with Conversion to Hydrogen Carrier
General MS Discussions
Sample Processing
- Air is Everywhere and Vacuum Sucks – the Anathema of Headspace Sampling
- Accurate Measure of Injection Volume with Scion 8400 Automated Sampler
- Split-Splitless Injection
Data Handling
- Calibration Processes for Bruker Workstation
- Data Integrity with Star Workstation
- A Case Against Using Internal Standards for EPA Method TO-15
- Peak Detection with Varian MS Workstation
- Peak Detection with Varian Star Workstation
- Preparing GC Chromatograms from Bruker Workstation for Publication
- Processing Very Big Signals
- Unlocking Retention Times
- Reconnection of 436-456 with MSWS
- Run Counters for Scion MS Workstations
- Preprogrammed Monitoring of System Performance
- PCB Pattern Matching Program Brochure
- Obscure Jewels with Scion MS Workstation
- Quirks with Scion MS Workstation
Special Applications
- Organic Nitrogen Measurement System
- Naphthalene in Ambient Air by GC/MS-MS Detection
- PCB Pattern Matching Program
- Peak Assignment for CHHSL Vapor Intrusion Analytes with Restek RTX-1 Column
- Peak Assignments for Illinois Tiered Approach to Corrective Action Objectives for Vapor Intrusion Measurements with Capillary Column
- Threshold Alarming for Chlorinated Hydrocarbons
- Run Counters for Scion MS Workstations
- Sulfur Measurement System 456 Brochure
Miscellaneous
- History of Varian Capillary Injectors
- History of Varian Gas Chromatographs
- Innovations from Varian
- Septum Lifetime with Scion 8400 AutoSampler
- Septum Selection for Scion Split
- Translation of Varian Injector and Detector Model Numbers into Scion Acronyms
- Hidden Gems with Scion 436-456
- Laboratory Safety
California Air Resources Board Standard Operating Procedures
- SOP 102-103v2-2 Procedure for theE Determination of C2 to C12 Hydrocarbons in Automotive Exhaust Samples by Gas Chromatography
- SOP MLD 119 Total Non-Methane Hydrocarbons and Methane in Motor Vehicle Exhaust Using Cryongenic Preconcentration and Flame Ionization Detection
- SOP TP019-LS CVS & GC Sample Bag Construction & Preconditioning
- SOP 148 v1-0 Procedure for the Analysis of C3 to C12 Hydrocarbons in Automotive Exhaust by Gas Chromatography Mass Spectrometry with Preconcentration System
US EPA Standard Operating Procedures
- Method TO-15A Determination of Volatile Organic Compounds (VOCs) in Air Collected in Specially Prepared Canisters and Analyzed by Gas Chromatography–Mass Spectrometry (GC-MS)
- RSK 175v2 Sample Preparation and Calculations for Dissolved Gas Analysis RSK
- Supplement to EPA Compendium Method TO-15 -Supplement