Agilent Manuals

This is an application note about Agilent's Scout Scan technology, which describes how to use Scout Scan technology to lock samples without deuterium in NMR liquid spectroscopy

This document describes the enhanced analysis of semi-volatile compounds using sub-ambient ELSD and HPLC. Evaporative light scattering detection (ELSD) is a powerful tool that can detect any sample that is less volatile than the mobile phase in HPLC applications, regardless of the optical properties of the compounds. ELSD offers distinct advantages over conventional UV or DAD detection, especially for gradient separations. In order to maximize the detection of non-UV absorbing semi-volatile analytes, ELSD detectors need to operate at lower temperatures. Most ELSDs today can evaporate highly aqueous eluents at ambient temperature, but for low molecular weight, low boiling point compounds, ambient temperature is still too high and sensitivity is poor. Sub-ambient ELSD is required to improve the detection of these compounds. The Agilent 385-ELSD is specifically designed to operate under these demanding conditions. It features a Peltier cooled evaporation tube that provides sub-ambient ELS detection down to 10 °C. Dry nitrogen gas is added during the evaporation step to facilitate solvent removal at sub-ambient temperatures.

This application note describes an effi cient and economical RTL-GC/FID method for determination of fatty acids in infant formulas. The fatty acids were converted to FAMEs using acetyl chloride-methanol methyl esterifi cation method. Agilent J&W HP-88 capillary GC column provides excellent separation for complex FAMEs including cis-trans isomer separation.

This application note describes the ultratrace determination of iodine-129 in aqueous samples using the 7700x ICP-MS with oxygen reaction mode.

This document presents an example of permanent gas analysis using the Agilent 490 Micro GC, including the separation of helium, neon, and hydrogen. The product offers the advantages of ease of use and fast analysis, with a total analysis time of less than 40 seconds.

This file describes the chiral separation and enantiomeric excess (EE) determination of three model chiral compounds using Supercritical Fluid Chromatography using the Agilent 1260 Infinity Analytical SFC system. The low detector noise of the system due to the SFC pump technology resulted in excellent sensitivity for trace analyte detec- tion of chiral impurities. When applying method optimization sufficient resolution was achieved for all compounds even under mass overload conditions. This allowed for the quantitation of impurities at 0.05 to 0.1% levels.

This document describes the method of using the Agilent 1260 Infinity Analytical SFC system for fast and ultra-fast SFC analysis. By using high flow rates, sub-2-µm particle technology, and short columns, separation times of less than 30 seconds with good resolution can be achieved. This method can increase sample throughput and reduce cost of ownership.

This article describes the use of Agilent PLgel columns and gel permeation chromatography (GPC) for polymerization studies. GPC separates molecules in solution based on their size, making it ideal for monitoring the effect of process variables on polymer synthesis. The study focuses on the polymerization of soya oil, and GPC analysis is used to observe the progress of the reaction and the formation of high molecular weight species.

This application note describes the use of Agilent PLgel columns and gel permeation chromatography to analyze petroleum. Petroleum analysis is a major source of organic chemicals for the petrochemical industry. The method uses liquid chromatographic separation and calculates molecular weight distribution after calibration of the system with suitable polymer standards. The application note provides an example of analyzing asphalt, where three linear hydrocarbons are resolved to baseline in a reasonably short analysis time.

This document introduces the application of Agilent PLgel 10 µm MIXED-B columns in polar organic solvents

This application note describes a method for accelerating the analysis of Group 4 pharmaceuticals in EPA-1694 using an Agilent 1290 Infinity UHPLC and an Agilent ZORBAX RRHD HILIC Plus column. All compounds provide excellent peak shapes, while the flow rate and sample throughput are increased by four times the original rate.

This application note describes a rapid, robust and easy to use protocol for identification of sturgeon species based on a well established PCR-RFLP method. The improved method allows analysis from sample to result in one working day and yields good discrimination results.

This application note describes a non-targeted metabolomic analysis approach to the classification of wine varieties, employing LC/QTOF MS and MassHunter Workstation software. Molecular feature extraction, data filtering, and statistical analysis utilizing ANOVA and PCA identified 26 marker compounds that were then used to build a PLSDA prediction model. An overall accuracy of 95.6% in discriminating between Cabernet Sauvignon, Merlot and Pinot Noir red wine varieties was obtained using the model. This approach may be widely applicable to the analysis and characterization of foods.

This document describes the method of fast separation of oxygen and nitrogen using Agilent 490 Micro GC and a 4 m MolSieve 5A column channel. The Agilent 490 Micro GC has the advantages of ease of use and fast analysis.

The document describes the method of analyzing amitriptyline, fluoxetine, quetiapine, and sertraline using dried blood spots. Blood is spotted onto a blood spotting card and allowed to dry, then samples are taken from the spot for analysis. A new non-cellulose material can also be used for other biological fluids. The use of dried blood spot analysis for drugs is gaining popularity in clinical trials in the pharmaceutical industry.