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Itq 1100

Manufactured by Thermo Fisher Scientific
Sourced in United States

The ITQ 1100 is a quadrupole ion trap mass spectrometer designed for analytical applications. It provides high-performance mass analysis and data acquisition capabilities. The device utilizes a quadrupole ion trap to capture, store, and analyze ions, enabling the detection and identification of various chemical species.

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11 protocols using itq 1100

1

Analytical Methods for Biomass Conversion

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HPLC (Waters 2489
equipped with Waters 1525 binary HPLC pump and UV detector at 284
nm) was utilized to analyze the yields of HMF and furfural. The column
was thermostated at 30 °C. The eluent CH3OH/H2O (0.2:0.8, v/v) was run at a flow rate of 0.8 mL min–1.
The carbohydrates (Glc, Fru, and furfural)
and organic acid content were analyzed using a liquid chromatography
system Agilent 1200 equipped with Aminex HPX-87H as a stationary phase
and a refractive index detector. The column was thermostated at 65
°C. The eluent (0.05 M H2SO4) was run at
0.55 mL min–1 flow rate. The amount of Cr3+ ions in a water solution collected after the reaction was quantified
by ICP-AES (IRIS Intrepid II XSP). HMF and side products were also
quantified using MS (Thermo Fisher ITQ-1100). The HMF yield from Glc
was calculated as

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2

Oxygen Incorporation in Diol Formation

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An experiment using labeled water (H2O18) was conducted to confirm the incorporation of oxygen into the reaction product diol from the water molecule. For this, 50 µg Yleh protein was incubated with 5 mM 1,2-EO at 30 °C for 1 h in 1 ml 50 mM Tris-sulphate buffer, pH 8.0, and an equal volume of labeled water (H2O18). Trace-Ultra GC (Thermo Fisher Scientific, USA) was used for GC-MS analysis. The sample was then centrifuged and extracted with ethyl acetate (1:1 v/v). It was further concentrated by drying and injected on a DB-5 column (30 m x 0.25 mm x 0.25 mm, Agilent Technologies, USA) connected to GC-MS and a mass detector (ITQ 1100, Thermo Fisher Scientific, USA) with helium as a carrier gas. The program used for analysis was as follows: initial temperature 60 °C, 15 °C/min up to 160 °C held for 30 s and 3 °C/min up to 200 °C and held for 1 min. The reaction product peaks were identified by m/z values and retention time using NIST Mass Spectral Library (NIST 05).
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3

Characterization of Novel Compounds

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Melting points (mp) were determined on a WRX-4 electrothermal melting point apparatus (Shanghai, China) and were uncorrected. The 1H NMR and 13C NMR spectra were recorded on a Bruker AV III HD 600 MHz spectrometer using CDCl3 or DMSO-d6 as solvent. Chemical shifts were expressed relative to tetramethylsilane (TMS) used as an internal standard and were reported as δ (ppm). The mass spectra were taken on Thermo Scientific ITQ 1100 instrument (Thermo Fisher Scientific, Waltham, MA, USA) with an EIS source and an ion trap analyzer in the positive ion mode. All the reactions were monitored by thin-layer chromatography (TLC) on Silica gel GF-254 plates and the products were separated by flash column chromatography on Silica gel H (Qingdao Haiyang Chemical, Qingdao, China).
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4

GC-MS Analysis of Volatile Compounds

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The GC–MS analyses of the samples were performed using a Trace GC Ultra gas spectrometer coupled to an ITQ 1100 mass spectrometer from ThermoFisher Scientific (Waltham, MA, USA) following the procedure described in our previous publications. An SPME (solid-phase micro-extraction) fiber with an absorbent (50/30 μm Divinylbenzene/Carboxene/Polydimethylsiloxane (DVB/CAR/PDMS), Stableflex (2 cm) 24 Ga (Sigma Aldrich, Poznań, Poland), was placed in the measurement chamber for 30 min together with the material emitting volatile compounds and then transferred to a GC injector for 5 min to desorb VOCs. The chromatographic analysis was carried out with the use of a Zebron ZB-5Msplus Capillary GC 30 m × 0.25 mm × 0.25 um column. The compounds were identified using the Wiley library. Compounds with a 75% identity level were selected [23 (link)].
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5

Transesterification and GC-MS Analysis of Fatty Acids

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The mixture of fatty acid methyl esters was obtained by transesterification of lipids with methanol in the presence of catalysts13 (link). Briefly, crude oil suspended in n-hexane (HPLC grade, Sigma-Aldrich) was evaporated and 0.5 M KOH-methanol (Sigma-Aldrich) was added and hydrolyzed at the temperature of 80 °C. Esterification was carried out by adding 10% BF3 in methanol (for GC derivatization, Fluka). The reaction was performed at 100 °C for 20 min. Next, 99% n-hexane (HPLC grade, Sigma-Aldrich) and a saturated NaCl solution (Sigma-Aldrich, Supelco) were successively added. Separation of methyl esters and determination of fatty acids was performed on a Trace GC Ultra gas chromatograph coupled with ion trap mass spectrometer ITQ 1100 (GC/MS) from Thermo Scientific using a Rtx-2330 column, with a length of 105 m, inner diameter of 0.25 mm, and film thickness of 0.25 μm. Helium at a flow rate of 2.4 ml/min was the carrier gas. To determine the fatty acid composition, separation of the mixture of standard solutions − 37 Component FAME Mix solutions (Sigma-Aldrich, Supelco) was carried out.
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6

Volatile Organic Compounds from Bacterial Strain DZSY21

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The VOCs produced by strain DZSY21 were collected using a 2-cm divinyl benzene/carboxen/PDMS (DCP, 50/30 μm) solid phase microextraction (SPME) fiber (Supelco, Bellefonta, PA, USA). Cell suspensions (20 μL, 10 8 CFU/mL) of strain DZSY21 were added into LB agar medium in a 100-mL vial covered with several layers of parafilm and incubated at 28 °C for 7 days without agitation. Uninoculated LB medium was used as the control. SPME fiber was then inserted into the vials and incubated at 50 °C for 30 min. After that, the SPME fiber was inserted into the GC-MS injector (Thermo Scientific ITQ1100, Waltham, MA, USA) and desorbed at 220 °C for 5 min (Xie et al. 2018; Jun et al. 2012) . The GC-MS program was 35 °C maintained for 3 min, then increased to 180 °C at 10 °C/min, further increased to 240 °C at 10 °C/min, and held for 5 min. The mass spectrometer was operated in the electron ionization mode at 70 eV with a source temperature of 220 °C, with scans from m/z 50 to 500. Mass spectral data were compared with data in the NIST/EPA/NIH Mass Spectrum Library (Xie et al. 2018) . Each treatment had three replications, and the assay was repeated three times.
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7

HCB-Contaminated Soil Remediation

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The 200g treated real HCB-contaminated soil sample were added to the wild-mouth bottle and mixed with a certain proportion of deionized water to form slurry. 0.8 g acetic acid and 0.2g iron nanoparticles were added, respectively. Then the pH of slurry was adjusted using NaOH and H 2 SO 4 solution and the initial pH was measured with a pH meter (PHSJ-4A, Shanghai ShengCi Instrument Company, China). The bottle was sealed, with N 2 gas sparged, and was incubated under the set temperature in the biochemical incubator for 23 days. At the end of each experiment, the supernatant of the mixture was separated from the solid residue using suction lter device. The quanti cation and structural con rmation of all four chlorobenzenes in the mud phase were analyzed using Gas Chromatograph-Mass Spectrometer (Thermo Fisher ITQ 1100). Each experiment was conducted in triplicate.
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8

GC-MS Quantification of Essential Oils

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Essential oil was diluted 100 times using n-hexane to achieve a 1 mL volume, and then 10 μL C12 and C19 was added to the diluted oil as an internal standard mixture solution (1 mg/mL in toluene). Samples thus prepared were subjected to quantitative GC-MS determination, as described by Kowalski and Wawrzykowski (2009) . The GC-MS analysis was performed on a TRACE GC Ultra Thermo chromatograph linked to a Thermo ITQ 1100 mass spectrometer using a DB-5 capillary column. The parameters set for the DB-5 column were 30 m × 0.32 mm i.d., 0.25 µm film thickness, column, oven temperature 50°C for 1 min, then 3°C/min to 200°C for 10 min. Helium was used as the carrier gas at a flow rate of 1 mL/min. The injector and detector temperatures were 200°C. A mass selective detector was operated in electron impact mode with ionization energy of 70 eV, a scan time of 0.5 s, and a mass range of 40-870 AMU. The qualitative analysis was based on MS spectra, which were compared with spectra from the NIST library (National Institute of Standards and Technologies, Mass Spectra Libraries).
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9

GC-MS/MS Quantification of Analytes

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GC-MS/MS analysis were carried out using a Trace GC Ultra, Thermo Scientific linked to an ion trap mass spectrometer (ITQ1100, Thermo Scientific) operating in splitless mode. Compounds were separated on an Agilent DB-5MS UI column (30 m  0.25 mm, 0.25-mm film thickness) using helium as the carrier gas (99.996% purity) at a flow rate of 1.3 ml/min. The injector and transfer line were set at 250 C and 300 C respectively, the source at 250 C. The column was held at 95 C for 6 min after injection and then programmed at 12 C/min to 320 C and held for 4 min. The mass spectrometer was operated in the electron ionization mode (EI, 70 eV) and analytes were detected using MS/MS mode. Analyte precursor and fragment ions and their associated IS used for quantitation are reported in Table S2. GC-MS/MS spectra were analysed on Xcalibur v1.2 software (Thermoquest-Finningan). Concentrations were determined using a least-square linear regression analysis of the peak area ratio (analyte to IS) versus the analyte concentration using a matrix-matched calibration curve.
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10

GC-MS Analysis of Lactones

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The analysis was carried out using GC-electron ionization mass spectrometry (GC-EI/MS; GC: TRACE GC Ultra, EI/MS: ITQ1100, Thermo Fisher Scientific, Waltham, MA) equipped with a capillary column (InterCap FFAP, 20 m× 0.18 mm i.d., 0.18 μm thickness, GL Sciences Ltd., Tokyo, Japan) . The column temperature was programmed to remain at 60℃ for 6 min, increase to 250℃ at 5℃ min -1 , and hold for 20 min. The injector temperature was set at 250℃. The flow rate of the carrier gas (helium) was 0.5 mL min -1 . The split ratio was 50:1 (v/v) and the injection volume was 1 μL. Electron impact spectra were acquired at 70 eV. Mass spectra were collected from m/z 20 to 300. The target compounds were detected at m/z=85 for all γ-lactones and at m/z=71 and 99 for δ-lactones, with the exception of δ-hexalactone (δ-C6) . The δ-C6 species was detected at m/z=42. All analyses were carried out in triplicate and the mean values are presented.
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