Author Archives: Robert

Aquamax KF Reagents combine speed and accuracy

Aquamax KF Reagents combine speed and accuracy

Aquamax KF Reagent A is a general coulometric KF anolyte for use with generator electrodes which incorporate a frit or diaphragm to separate the anode and cathode chambers. Used in conjunction with Aquamax KF Reagent C this formulation is supplied in a pack of 8 x 100ml bottles and 8 x 5ml cathode ampoules, all conveniently located in a single carton. This UN certified carton can be used to transport these reagent packs by road, rail, sea and air and the total pack volume is less than one litre so they can be shipped as limited quantity.

To conform to ASTM, API, EI, ISO (plus other) methodologies for water content determination of oil and petroleum products, the anode regent must be modified with xylene to improve sample solubility and miscibility. Aquamax KF Reagent A is pre-cut with xylene, and other solubilizers to eliminate side reactions, so that the operator does not have to store or mix chemicals.

We conducted extensive comparison trials of Aquamax KF Reagents against other leading brands with very positive results. Using water standards ranging from 10 µg water up to 10,000 µg water under controlled conditions we found Aquamax KF Reagent to be equivalent in perfomance accuracy to the other brands but much faster in titration speed and with low background drift value.

GR Scientific – Listening to what the industry needs.

Karl Fischer Titrator Rentals

Karl Fischer Titrator Rentals

Do you have a short term project with a limited budget and don’t want to invest £1000’s in a new coulometric titrator? Perhaps you just need a titrator for a few months but are unable to add it to your capital budget but could possibly include it on a short term consumables budget?

GR Scientific are aware that these situations can occur and have introduced a new instrument rental policy for their coulometric titrators which enables you to rent either the laboratory based model Aquamax KF Plus or the field model Aquamax KF Portable at very low prices and with only a short term three month commitment.

GR Scientific – Listening to what the industry needs.

Water Check Button Feature

Water Check Button Feature

As active members of ASTM and API we are always listening for what the industry requires from the instrument manufacturing companies to enable equipment to be more easily used, especially in the field. One feature that many users have requested for their Karl Fischer titrators is a single button to enable them to check the instrument with a water standard.

In principle, standardization of a Coulometric Karl Fischer is not necessary since the water titrated is a direct function of the coulombs of electricity consumed. However it is recognised that reagent performance can deteriorate with use over time and it is recommended that the titrator is regularly monitored by introducing a known quantity of water that is representative of the typical range of water concentrations being determined in samples.

Several of the ASTM methods for water content of crude oil and petroleum products suggest injecting between 1.0 μl and 10 μl distilled water to check reagent performance. Each of these methods requires that the result be recorded in micrograms of water, not as a calculated ppm
or percentage.

The μg check button on every Aquamax KF Coulometric Titrator enables this check to be done without the need to reprogram the calculation mode. Simply press μg check and the display will prompt “add standard”. Introduce 10μl of distilled water (as required by ASTM methods) by syringe and both the display and print out will be in micrograms water. This only applies to a single analysis as the titrator will then revert back to the programmed calculation mode for subsequent runs.

GR Scientific – Listening to what the industry needs.

Aquamax KF used offshore

Aquamax KF used offshore

A recent television documentary about life working on an offshore oil platform in the North Sea included a section about the Platform Chemist and his duties. One of his main daily tasks was to collect a crude oil sample and determine the water content using an Aquamax KF titrator. See the whole clip on our website Video section.

GR Scientific – Listening to what the industry needs.