Industrial

A single, rapid GC method for aromatic solvent purity analysis is described. The application of a high-efficiency 0.18-mm-id GC column results in faster analyses compared to conventional 0.25-mm- or 0.32-mm-id columns without losing mea- surement performance.

This application brief describes a configuration of Agilent 7890A GC with three parallel channels and a TCD detector that provides complete refinery gas analysis (RGA), including nitrogen, hydrogen, oxygen, carbon monoxide, carbon dioxide, hydrogen sulfide, and methane, on one instrument.

This document introduces the technology for analyzing trace compounds in ethylene using the Agilent 7890A GC, including methods for analyzing trace oxygenates and hydrocarbons.

This document introduces a high-pressure liquid injection device that can be used for high precision and accuracy measurements of highly volatile liquefied hydrocarbons in gas chromatographs. The device consists of a needle interface and a liquid rotary valve, and can be used to sample light petroleum matrices with broad boiling point distributions.

Agilent 7890A gas chromatograph GC x GC technology introduction

This application describes a method for determining the ester and linoleic acid methyl ester content of fatty acid methyl esters (FAME) intended for use as pure biofuel or as a blending component for heating and diesel fuels. The method is suitable for FAME con- taining methyl esters between C14 and C24. This applica- tion used the Agilent 6850 System and HP-INNOWax column; calibration was achieved with internal standards of methyl heptadecanoate. After analyzing several differ- ent types of biodiesel, excellent precision was obtained, exceeding the EN14103 method specifications.

This application note describes the use of the Agilent 1200 Series Rapid Resolution LC (RRLC) system for the separation of antioxidants and erucamide. The system can operate significantly faster than conventional HPLC systems without sacrificing resolution, precision, or sensitivity. The column chemistry and temperature influence on the separation and the sample preparation method are also discussed.

This document describes the use of vitamin E (tocopherol), phenolic antioxidants, and erucamide slip additives in polypropylene homopolymer formulations, as well as their analysis and detection using liquid chromatography with ultraviolet/visible detection. The Agilent 1200 Rapid Resolution LC system with Agilent ZORBAX RRHT columns allows for rapid separation of these antioxidants with the same or improved resolution. The Agilent method translator can be used to convert the ASTM method into new methods based on instrument parameters, column dimensions, and particle size in three modes: simple conversion, speed optimized, and resolution optimized methods.

This document describes an improved chromatographic method for monitoring the bisphenol-A manufacturing process using Agilent RRHT Eclipse XDB-C18 columns. These columns use 1.8-µm particles versus conventional 3.5-µm or 5-µm particles, allowing seven times faster analyses, improved resolution, and higher sensitivity.

This Application Note demonstrates how a daily throughput of far more than 1000 samples can be achieved together with full spectral data acquisition and accurate mass information with close to FT-MS mass accuracy using the Agilent 1200 Series Rapid Resolution LC system and the Agilent 6210 TOF MS.

The Agilent 7500ce ICP-MS is shown to be an excellent analytical tool for the elemental analysis of gasoline. It offers the best detection limits of any multi-element tech- nique and a full elemental analysis suite that takes less than 5 minutes to acquire. The Octopole Reaction System (ORS), integral to the 7500ce, ensures that a single method and set of conditions can be used to directly determine all elements of interest in the sample. Comparison data for selected elements in both gas mode and no-gas mode highlight the effectiveness of the ORS for interference removal. Results showing the excellent long-term stability of the 7500ce ORS are also given.

A rapid simulated distillation method is described for analysis of petroleum fractions boiling within the range of ASTM D2887. The method employs an Agilent 6890N gas chromatograph equipped with a split/splitless inlet, flame ionization detector (FID), oven insert, and 3-meter 180-µm id capillary column. Compared to conventional ASTM D2887, the accelerated method yields run times at least two times faster. It yields results comparable to traditional D2887, and agrees with the guidelines of ASTM method D2887 based on published results for the reference gas oil (RGO).

This document is the technical manual of OPA137 series FET-input operational amplifiers. This series of operational amplifiers are designed for low cost and miniature applications. In addition to small size (SOT-23-5 and MSOP-8 packages), they also provide low input bias current (5pA), low quiescent currrent (220µA/ channel), and high open-loop gain (94dB). Either single (+4.5V to +36V) or dual (±2.25 to ±18V) supplies can be used. The input common-mode voltage range includes the positive supply—suitable for many single-supply applications. Single, dual, and quad versions have different package sizes and pin configurations.

A new method for the analysis of trace methanol in crude oil samples was developed based on two-dimensional heart-cutting gas chromatography. The method was tested on an Agilent 6890N GC system equipped with a new gas phase microfluidic Deans switch that improved the performance of heart-cutting two-dimensional gas chromatography. The results obtained with this method exceeded the performance requirements of ASTM D7059 for the analysis of methanol in crude oil.