Industrial

This application note describes methods for analyzing C1-C6 light hydrocarbons.

A method for the analysis of ppb level volatile sulfur compounds in a variety of hydrocarbons using a 6890N gas chromatograph equipped with dual flame photometric detectors is described. Thick film DB-1 and GS-GasPro columns are employed, and enhanced performance flame photometric detectors are used that can achieve detection of sulfur compounds below 20 ppb. Examples of arsine and phosphine analysis with the same hardware are also discussed.

The document mainly introduces the application range, characteristics and detection performance of Agilent Refinery Analyzer product. It can be used to analyze oxygenates in butane feed stocks, gasoline and naphtha

The document introduces the technical overview of an Agilent Natural Gas Analyzer. The instrument uses a Thermal Conductivity Detector (TCD) to identify components such as isobutane, n-butane, isopentane, n-pentane, carbon dioxide, ethane, hydrogen sulfide, propane, oxygen/argon composite, nitrogen, methane, and carbon monoxide. The lower detection limit of the TCD is 200 ppm for most components, except for carbon monoxide which is 400 ppm. The system is compliant with Gas Processors Association Methods 2177 and/or 2261, and the analysis time is approximately 25 minutes.

The mass selective detector is an ideal tool for the analysis of trace level volatile sulfur compounds. It provides structural information and achieves excellent sensitivity and selectivity in the Selected Ion Monitoring mode. This paper demonstrates the low parts-per-billion analysis of eight volatile sulfur compounds in various hydrocarbon matrices. The system is well suited for fuel cell developers to characterize fuel feedstocks and analyze impurities that can poison critical catalytic processes. Measurement of carbonyl sulfide in propylene is also demonstrated.

Describes an inert valving system for the analysis of ppb level volatile sulfur compounds in food grade carbon dioxide using the Agilent 6890.

A comparison of four selective detectors for analysis of single-digit ppb level sulfur is described

Polyvinyl alcohols (PVA) are industrially synthesized by the catalytic reaction of polyvinyl acetates with alcohols, typically methanol. Due to properties such as excellent biological degradeability, water solubility , toxilogical harmlessness they are widely used as emulgators, binding agents in adhesives, salves and haircream. The properties can be varied with the molecular weight distribution and the molecular weight which ranges from 20000 to 100000 g/mol. Both parameters can be fast and reliably monitored by aqueous SEC. This is a convenient method for quality control analyis, and is more informative in production control and end-use performance evaluation than single- point viscosity measurements.

This document introduces the molecular weight characterization method of polyacrylamides.

This document describes the process control of polyamide-6,6, which is widely used in the textile, construction, and electronic industries. The properties of polyamide-6,6 depend on its molecular weight and molecular weight distribution.

This document introduces the characteristics of polystyrene products, including molecular weight and molecular weight distribution.

Measuring intraday and interday precision of GPC-SEC analysis data

This paper describes the method of analyzing sulfur anions in Kraft liquors using capillary electrophoresis in the chemical recovery process at a Kraft pulp mill. Sulfur anions, such as sulfate in the black liquor, are converted to sulfide anions in the green liquor. Sulfide anions in the pulping reactions produce stronger paper, but if their concentration is too low, the paper loses its strength, and if the concentration is very high, polluting emissions from the Kraft recovery furnaces are increased. Wet chemical tests and Ion Chromatography (IC) have traditionally been used to analyze process liquors. However, capillary electrophoresis is a suitable replacement for IC due to its benefits of less buffer consumption, less maintenance, and considerably shorter run times.