Chlorinated ethenes and ethene were analyzed with an Agilent G1888 headspace sampler connected to an Agilent 7890 gas chromatograph (GC) equipped with a flame ionization detector (method detection limit ≈ 0.2 μM) and a DB-624 capillary column (60 m length × 0.32 mm diameter, 1.8 μm film thickness).34 (link) Fumarate and succinate were quantified using an Agilent 1200 series high-performance liquid chromatography system equipped with an Aminex HPX-87H column and a dual-wavelength absorbance detector set to 210 nm.38 (link) N2O was analyzed by injecting 100 μL headspace samples into an Agilent 7890A GC equipped with an HP-PLOT Q column (30 m length × 0.320 mm diameter, 20 μm film thickness) and a microelectron capture detector. The OD measurements were conducted with a PerkinElmer Lambda 35 UV−vis spectrophotometer by transferring 1 mL cell suspension into a cuvette and recording readings at 600 nm.
G1888 headspace sampler
Manufactured by Agilent Technologies
Sourced in China, United States, India
The G1888 headspace sampler is a laboratory instrument designed to analyze volatile organic compounds in liquid or solid samples. It is used to automatically extract and inject sample headspace vapors into a gas chromatograph for analysis. The device maintains a controlled temperature environment to ensure consistent sampling and reproducible results.
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Lab products found in correlation
7890 gas chromatograph, by Agilent Technologies (1 mentions)
Hpx 87h column, by Aminex (1 mentions)
Db 624 capillary column, by Agilent Technologies (1 mentions)
Lambda 35 uv vis spectrophotometer, by PerkinElmer (1 mentions)
Hp plot q column, by Agilent Technologies (1 mentions)
Db 624 column, by Agilent Technologies (1 mentions)
Agilent 7890 gas chromatograph gc, by Agilent Technologies (1 mentions)
Agilent 6890 series gc, by Agilent Technologies (1 mentions)
Hp 5 fused silica capillary column, by Agilent Technologies (1 mentions)
7890a gas chromatograph, by Agilent Technologies (1 mentions)
Chemstation, by Agilent Technologies (1 mentions)
Msd chemstation software, by Agilent Technologies (1 mentions)
6 protocols using g1888 headspace sampler
1
Quantitative Analysis of Metabolites and Gases
2
Headspace GC-MS Metabolite Analysis
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The instruments and equipment included an Agilent G1888 headspace sampler, an Agilent 7890A-5975B GC-MS meter, Agilent headspace injection bottles (20 ml) (at Zhejiang Provincial Key Laboratory of Biological and Chemical Utilization of Forest Resources, Hangzhou, Zhejiang, China), an Agilent bottleneck opener, an electronic balance (sensitivity 0.1 mg, Shanghai Mettler Company), a pipette (1 ml, 100 μl, 10 μl Eppendorf), an IKA SM3 vortex oscillator, and an oil press (zyj-9018 Best day).
3
Quantifying Residual Ethanol Levels
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The spray-dried SD was tested with a residual solvent (ethanol) using an Agilent 7890A gas chromatograph (Agilent, CA, USA) equipped with a flame ionization detector connected to an Agilent G1888 headspace sampler. GC analysis was performed on a capillary DB-624 column (0.32 mm × 30 mm, 1.8 um; Agilent, Santa Clara, CA, USA). The initial separation temperature within the column was 40 °C, which was raised to 80 °C at a heating rate of 10 °C/min at 100 kPa with a retention time of 5 min and an injection volume of 1000 uL. The carrier gas was helium with a flow rate of 1 mL/min.
4
Quantifying Chlorinated Ethanes in Groundwater
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Chlorinated ethane concentrations in field samples were stored at 4 °C and were measured within 48 hours after the samples arrived at the University. Microcosm were first shaken and then sampled using gas-tight glass syringes and sterile needles inside the glovebox, and analyzed immediately. Aliquots (0.5 -1 mL) from groundwater or microcosm samples were added to acidified MilliQ water to a total liquid volume of 6 mL in 11 mL crimped-cap headspace autosampler vials and placed in the Agilent G1888 Headspace Sampler. Headspace was analyzed using the Agilent 7890 gas chromatograph (GC) equipped with the GS-Q column and detected using a flame ionization detector (FID). External standards, purchased from Sigma, were first diluted with methanol, and then in acidified MilliQ water for calibration.
A modified EPA 8021 method was used as per Kocur et al. (2015) . Several groundwater samples were also analyzed for total COD according to the EPA Method 410.4 (USEPA, 1993).
A modified EPA 8021 method was used as per Kocur et al. (2015) . Several groundwater samples were also analyzed for total COD according to the EPA Method 410.4 (USEPA, 1993).
5
Quantitative Analysis of Formaldehyde by GC-FID
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Analysis of formaldehyde was performed with an Agilent flame ionization detector (FID) (Agilent, Santa Clara, CA, United States) equipped with the Agilent GC 6890 series (Agilent, USA). The column used was an Agilent HP5 fused silica capillary column (30 m × 0.32 mm, film thickness 0.32 µm). The injector and detector temperatures were 200 °C and 250 °C, respectively. Hydrogen (7.39 psi on column) was the chosen carrier gas. The initial oven temperature was set at 40 °C, held for 3 min and increased to 130 °C after ramping at 20 °C/min. The total run time for the analysis was 7.5 min.
The 20 mL headspace vials were incubated in the headspace of an auto-sampler (Agilent G1888 headspace sampler) at 90 °C for 15 min. After equilibration, 0.2 mL of the headspace vial was pressurized into GC/FID. The loop and transfer line temperatures were set at 95 °C and 100 °C, respectively.
The 20 mL headspace vials were incubated in the headspace of an auto-sampler (Agilent G1888 headspace sampler) at 90 °C for 15 min. After equilibration, 0.2 mL of the headspace vial was pressurized into GC/FID. The loop and transfer line temperatures were set at 95 °C and 100 °C, respectively.
6
Gas Chromatography-Mass Spectrometry Protocol
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The gas chromatographic and mass spectrometric data were recorded using ChemStation and MSD ChemStation Software (Agilent, Santa Clara, CA, USA). This headspace chromatography (GC-HS-MS) method was developed and validated using a 7890A gas chromatograph equipped with a G1888 headspace sampler and coupled with 5973C GC-MS (Agilent, Gurugram, India). The linearity analysis and plot creation were performed using Analyseit for Microsoft Excel 5.68 (Microsoft Corporation, Redmond, WA, USA and Analyse-it software limited, Leeds, UK). Analyse-it software was used for the statistical analyses.
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