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18 protocols using 1290 uplc

1

QTOF/MS-UPLC Metabolomics Analysis

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Mass Spectrometer (QTOF/MS-6550, Aglient), Ultra-High Performance Liquid Chromatograph (UPLC-1290, Aglient), Vortex mixer (MIX-200, Jingxin, Shanghai), centrifuge (5427R, Eibend, Germany), acetonitrile and methanol were bought from Merck (Darmstadt, Germany). Formic acid and 2-chlorophenylalanine were from Thermo Fisher. All chemicals were of chromatographic grade.
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2

Comprehensive Lipidomic Profiling of Plasma

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The Agilent Qtof 6545 and UPLC 1290 assay detects about 700 distinct lipid species across 13 different lipid classes (e.g., lysophosphatidylcholines, lysophosphatidylethanolamines, phosphatidylcholines, phosphatidylethanolamines, sphingomyelins, diacylglycerols, triacylglycerols, free fatty acids, cholesterol, ceramides, dihydroceramides, hexosylceramides, and lactosylceramides). Each sample is run once on the platform using positive and negative ionization modes. Data acquisition lasts for 20 min per sample, and 25μL of the plasma equivalent will be injected. Data quality will be ensured by using a set of lipid standards after each cleaning, 24 hr of idling or 3 days of consecutive use, performing a quick system suitability test before each batch to ensure acceptable limit of detection for each lipid class, sample randomization for lipid extraction and data acquisition, and triplicate injection of lipids extracted from a reference plasma sample at the beginning of the batch.
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3

UPLC-Q-TOF-MS Analysis of Drugs

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Chromatographic analysis was performed using an ultra-performance liquid chromatograph (UPLC 1290, Agilent Technologies, Germany). The separation was done employing a Poroshell 120 EC-C18 column 3.0 × 100 mm; 2.7 µm (Agilent Technologies, USA) with a thermostat at 40 °C. A mixture of 0.1 % formic acid in water (A) and 0.1 % formic acid in acetonitrile (B) was used as a mobile phase. Gradient elution was carried out at a constant fl ow of 0.4 mL min -1 . The following gradient was applied: 0 min 95 % A (5 % B), 0-5 min 30 % A (70 % B), 5-7 min 0 % A (100 % B) and then 7-8.5 min 100 % A (0 % B). Return to the starting gradient composition (95 % A and 5 % B) was performed at 4 min. The injected volume was 10 µL. Detection of the investigated compounds was achieved using a quadrupole coupled to time-of-fl ight analyzer (Q-TOF-MS 6540, Agilent Technologies, USA). The spectrometer was equipped with an ESI Jet Stream source; identifi cation and determination of the investigated drug was carried out in the SCAN mode. Operating spectrometer parameters are presented in Table I.
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4

Quantitative Analysis of Metabolites

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Frozen samples were centrifuged for 10 min at 4 °C at 20,817g to remove salts. The supernatant was removed and analyzed by LC–QQQ using MRM in positive ionization mode on an Agilent 6460 QQQ MS. Samples were analyzed on two tandem Ascentis Express RP-amide HPLC columns (2.7 μm, 2.1 mm × 10 cm, 25 °C; Supelco) on an Agilent 1290 UPLC using an isocratic solvent system of 10% acetonitrile in 0.1% (v/v) formic acid as the aqueous mobile phase for 20 min after an initial ramp of 0 to 10% acetonitrile over 0.5 min at flow rate of 0.4 ml min−1. Products were monitored with transitions as follows (parent ion m/z → product ion m/z, fragmentor, collision energy): TKL (171 → 153, 90,6); H-TKL (157 → 139, 90, 4); F-TKL (175 → 157, 90, 5) and H-TTKP (199 → 111, 100, 9). The identity and the quantity of each compound was verified against synthetic standards using external standard curves. Synthetic standards were obtained as previously described28 (link).
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5

Analytical Techniques for Organic Contaminants

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Organic contaminants were determined on a high-performance liquid chromatography (HPLC) system (1200, Agilent Technology, USA) equipped with a C18 column (4.6 × 250 mm, 5 μm). TPs of BPA were analyzed on an HPLC system (1290uplc, Agilent, USA) connected with a triple quadrupole mass spectrometer (QTOF6550, Agilent, USA), the details are provided in Supplementary Note 3. EPR spectra were obtained using MS-5000 spectrometer (Bruker, Germany) (Supplementary Note 7). Kinetic solvent isotope effect, FFA and DPA product detection was used to determine 1O2 production (Supplementary Note 8,9). Electrochemical characterization was performed using a CHI 760E electrochemical workstation equipped with a standard three-electrode system (Supplementary Note 14). The optimized geometry of BPA was optimized using the Gaussian 09 with a basis set of B3LYP/6–31G (d, p) and was visualized using Multiwfn60 (link). The aquatic toxicity of the transformation byproducts was predicted using the USEPA ECOSAR program26 (link).
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6

UPLC-QTOF Lipids Analysis Protocol

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Lipids analysis was performed with 1290 UPLC (Agilent, USA) equipped with Triple TOF 6600 (Q-TOF, AB Sciex, USA), using a Phenomen Kinetex C18 100A Column (100 × 2.1 mm, 1.7 μm). The mobile phase A was comprised 10 mM Ammonium acetate, 40% H2O and 60% ACN, and the mobile phase B was comprised 10 mM Ammonium acetate, 10% CAN and 90% IPA. An elution gradient started with 40% B for 12 min; subsequently changed to 100% B within 1.5 min; at 13.7 min, changed to 40% B again. Run duration was 18 min with 300 μL/min. The injection volumes were 1 μL (positive mode) and 3 μL (negative mode). The Analyst TF 1.7 (AB Sciex, USA) constantly assessed the comprehensive scan survey MS data as it collected and touched off the acquisition of MS/MS spectra depending on preselected criteria. The program of ESI source: ion source gas 1 and 2 were 60, curtain gas was 30; the source temperature was held at 550°C, ion spray voltage floating was 5,500 and −4,500 V.
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7

Multimodal Imaging and Analytical Techniques

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Scanning electron microscopy (SEM) images were recorded by a scanning electron microscope (Zeiss Sigma). In vivo imaging was conducted by the Spectrum Pre-clinical In Vivo Imaging System (IVIS, PekinEmer). The cell viability was measured by the microplate reader (Bio-Rad, Model550, USA). Blood routine analysis was examined by Auto Hematology Analyzer (MC-6200VET) and blood biochemistry analysis was conducted by biochemical auto analyzer (MNCHIP, Tianjin, China). Trans-epidermal water loss (TWEL) was measured by TEWL tewameter (TM300) (Cologne, Germany). Skin hydration, and skin elasticity were evaluated by Imate Skin Moisture Tester (M − 6602). Scratch wound-healing assay was carried out by fluorescence inverted microscope (Olympus IX73P2F). Mass spectrometry was performed by Liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) (Agilent 1290 uplc and Agilent qtof 6550). Confocal microscopy images were recorded on a confocal laser scanning microscope (CLSM) (Nikon C1-si TE2000). Enzyme-linked immunosorbent assay kits were provided by Multi Science.
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8

Quantification of Oxidized Glutathione by HPLC-MS

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The oxidized glutathione (GSSG) diffusion experiment was performed on an ion trap (6340, Agilent Technologies). Analyses were performed using an isocratic flow (1100 HPLC, Agilent Technologies) of 50μl/min (50% A = 0.1% formic acid in water, 50% B = 0.1% formic acid in acetonitrile). The system was operated in positive electrospray ionization mode. In MS mode, the maximum accumulation time was 500 ms, scan range of 50-2200 m/z, and averages = 3. For multiple reaction monitoring (MRM), masses were selected and isolated for MS(n) with a width of 4.0. For E. coli, a direct injection of 30-592 cells (OD) generated a satisfactory signal in an injection volume of 2 μl. ESI-TOF analyses were performed using an isocratic flow (1290 UPLC, Agilent Technologies) of 50μl/min (50% A = 0.1% formic acid in water, 50% B = 0.1% formic acid in acetonitrile) coupled to a Q-TOF (6538, Agilent Technologies). The system was operated in positive electrospray ionization mode, using extended dynamic range (50-1700 m/z), 1 scan per second. For E. coli, direct injection of 148-2960 cells in an injection volume of 10 μl generated satisfactory signal, without saturating the chip or MS.
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9

Serum Biomarkers for Bone Health

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Fasting morning serum was collected from all subjects. Serum was
archived at −80 degrees C and analyzed in one batch after all visits were
completed. Laboratory assays were performed in the Core Laboratory of the CUMC
Clinical and Translational Research Center. Serum calcium, albumin, and
creatinine were measured using automated techniques. Serum 25-hydroxyvitamin
D2 and D3 were measured by Ultra-performance Liquid
Chromatography combined with tandem mass spectrometry (UPLC-MS/MS) using a 1290
UPLC and a 6410 Tandem Mass Spectrometer (Agilent, Santa Clara, CA). Inter-assay
coefficient of variation (CV) was 2.9% for 25OHD2 and 5.4% for
25OHD3. Intact parathyroid hormone (iPTH) was measured by
chemiluminescent immunoassay (CLIA, Siemens Healthcare Diagnostics, Deerfield,
IL; CV 8.3%). Serum C-terminal telopeptide of type 1 collagen (CTX) was measured
by ELISA (Immunodiagnostics Systems, Scottsdale AZ; CV <10%). Serum
osteocalcin was measured by ELISA (Immunodiagnostic Systems, Scottsdale,
Arizona; CV 2.7%). Serum bone alkaline phosphatase was measured by ELISA (Quidel
Corp, Sand Diego, CA; CV 7.6%).
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10

Characterization of Radiolabeled Compounds

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All chemical reagents and solvents were purchased from commercial sources (Sigma-Aldrich, St. Louis, MO, USA; BroadPharm, San Diego, CA, USA; Fisher Scientific, Hampton, NH, USA) and used as received unless otherwise stated. For aqueous buffer solution preparation, Milli-Q water was obtained from a Millipore Gradient Milli-Q water system (Burlington, MA, USA). Nuclear magnetic resonance (NMR) spectra were recorded on a Bruker 400 MHz NMR (Billerica, MA, USA). Liquid Chromatography-Mass Spectrometry (LC-MS) of compounds were performed by an Agilent 6540 Accurate-Mass Quadrupole Time-of-Flight LC/MS system equipped with 1290 UPLC (Santa Clara, CA, USA). HPLC purifications were performed in an Agilent 1260 Infinity Preparative HPLC system equipped with 1260 photodiode array detector (PDA) and an Agilent Prep-C18 column (150 × 21.2 mm, 5 μm) (Santa Clara, CA, USA). The radiolabeled compounds were characterized by a Waters 600 HPLC system equipped with a Waters 2996 PDA (Milford, MA, USA) and an in-line Shell Jr. 2000 radio detector (Spotsylvania, VA, USA).
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