By Method

Karl Fischer Reagent

This test method covers the determination of water in the concentration from 50 to 1000 mg/kg in liquid petroleum products.

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ICP & DCP

(ICP) Inductively Coupled Plasma, (DCP) Direct Coupled Plasma: ICP and DCP are atomic emission techniques using argon plasma as an excitation source. Sample solution is introduced into the high temperature argon plasma through a nebulizer using a system very similar to atomic absorption (AA) system. The high temperature plasma provides excellent sensitivities for refractory elements and also eliminates chemical interference, giving extensive linear dynamic range of calibration.

The main advantages of the ICP and DCP in general are its multi-element analysis capabilities and wide dynamic calibration ranges. It makes these the most flexible instruments available today to analyse trace metals with excellent detection limits in parts per million.

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HPLC

High Performance Liquid Chromatography (HPLC) is one mode of chromatography, the most widely used analytical technique. HPLC utilises a liquid mobile phase to separate the components of a mixture. The interaction of the solute with mobile and stationary phases can be manipulated through different choices of both solvents and stationary phases. As a result, HPLC acquires a high degree of versatility not found in other chromatographic systems and it has the ability to easily separate a wide variety of chemical mixtures.

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GPC

Gel Permeation Chromatography (GPC) is a technique which separates components of a sample based on their molecular size. Since lipids are very large molecules compared to the target compounds in these methods, they are effectively removed from the extract prior to analysis. This improves method performance and extends GC column life, leading to more efficient analyses. With auto sampling and automatic fraction collection as part of the GPC system, the cleanups can be performed with little or no operator intervention, requiring only that the final extracts be concentrated down.

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Flash Point – Setaflash

This method is used for testing a sample at a specific temperature. At a set temperature, the specimen being tested and the air-vapor mixture above it is close to thermal equilibrium. This procedure may be used to determine the actual flash point temperature of a sample or whether a product will or will not flash at a specified temperature.

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