Industrial

This article introduces the application of carbon nanotube tips in MAC mode AFM measurements in liquids. Carbon nanotube tips, with sharp geometry, intrinsic electrical conductivity, and mechanical resilience, offer a solution to the common tip-wear problem and have been successfully demonstrated in lithographic oxidation of hydrogen-passivated silicon surfaces.

MAC Mode Atomic Force Microscope for Precision Interfacial Force Measurements

This application note presents a primer on the direct and reverse piezoelectric effects and their uses, and the instrumentation and applications of piezoresponse force microscopy.

This application note introduces the basic principle and applications of fluorescence microscopy, as well as the features and advantages of Agilent fluorescence microscopes.

This document presents a practical example of backflushing using the Agilent QuickSwap accessory for analyzing polychlorinated biphenyls (PCBs) in waste oil. The benefits of using QuickSwap instead of the traditional high-temperature bakeout procedure are demonstrated, including significantly reduced column and detector contamination and increased sample throughput.

The Scanning Microwave Microscope Mode is a new scanning probe microscope (SPM) that combines the electromagnetic measurement capabilities of a microwave vector network analyzer (VNA) with the nanometer-resolution and Angstrom-scale positioning capabilities of an Atomic Force Microscope (AFM).

This application note describes how to use Agilent ZORBAX Rapid Resolution High Throuhput (RRHT) Eclipse Plus Phenyl-Hexyl column for high-resolution analysis of 13 taxane derivatives. Improved silica, endcapping, and bonding technology, as well as the molecular interactions of the phenyl-hexyl moiety with the conjugation within the taxane derivatives, make the Eclipse Plus Phenyl-Hexyl column an ideal choice for this RRHT taxane method.

This Application Note describes the methods for metabolite identification using the different scan modes available with the Agilent 6410B Triple Quadrupole LC/MS system, as well as the use of the Agilent 1200 Series Rapid Resolution LC (RRLC) system for separation of compounds in complex mixtures on Agilent ZORBAX Rapid Resolution High Throughput (RRHT) columns with 1.8 µm particle size. It also discusses the use of the Agilent MassHunter Workstation software for data acquisition and qualitative data analysis.

This application illustrates the improvement in run-to-run response robustness in a biological sample using the pressure-controlled tee (PCT) arrangement.

This note describes a rapid IgM quantification method for cell culture product and purification process monitoring using the Agilent Bio-Monolith QA column.

This article describes a simple, robust and reliable method for the measurement of 21 trace elements in high-purity ammonium paratungstate (APT) using an Agilent 7500cx ICP-MS fitted with a High Matrix Introduction (HMI) system. HMI is a new sample-introduction accessory specially designed for concentrated samples with high total dissolved solids (TDS). Comparing results obtained using different APT sample digestion methods shows that dissolving the material in heated 4% H2O2 minimizes the formation of interferences on difficult elements such as phosphorus and silicon. APT samples containing 1% TDS were analyzed directly using the HMI's ultra robust mode. Results were calculated using the method of standard addition (MSA). Interferences on challenging elements such as Ca, K, Fe, and Si were removed by the Octopole Reaction System (ORS), a standard component of the Agilent 7500cx. The short turnaround time, including sample preparation and analy- sis time, indicates that the method is suitable for onsite testing.

This application note describes a method for rapid analytical separation and quantification of human polyclonal IgG using the Agilent Bio-Monolith Protein A HPLC column. The method is applicable to the separation of IgG from complex mixtures and can also be used to monitor fermentation titers throughout large scale IgG production.

This Application Note describes a new quantitative method for the determination of ultratrace elemental impurities present in photovoltaic grade silicon using the Agilent 7500cs ICP-MS. Boron (volatile element) and phosphorus (subject to Si-based interferences) are of particular importance to the industry; therefore, special attention was given to the sample pretreatment stage in order to analyze these elements by ICP-MS. Good recov- ery results for all elements validated the sample preparation strategy. Example data for a range of elements present in 13 different Si samples is presented, along with a list of detection limits. B and P can be determined at the low ppb level in the solid and other elements studied can be measured at the ppt level.

This Application Note describes a rapid and sensitive method for quantification of fluvastatin in plasma using the Agilent 1200 Series Rapid Resolution Liquid Chromatography (RRLC) system and the Agilent 6410 Triple Quadrupole LC/MS system. Sample preparation was carried out by a simple protein precipitation step. Atorvastatin at 40 ng/mL was used as the internal standard. The developed method had a short run time of two minutes and was found to be linear in the concentration range of 0.5 ng/mL to 200 ng/mL. The limit of detection (LOD) of the method is 0.2 ng/mL, or 1 pg on-column.

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