Investing in Our Future - Sheffield Assay Office

Here at Sheffield Assay Office, we are continually researching the market to ensure that we have the latest equipment to carry out our testing. This covers all areas of the business as we look to new innovations.

We are therefore pleased to share that we have recently purchased a number of new pieces of equipment, all of which will enhance our current processes and indeed in many cases cut the amount of time to process.

Within the hallmarking areas, we have a new XRF testing machine the new model Fischer XAN-250. With it’s modern silicon-drift detectors this means that we experience much less electronic noise than previously. It also gives much higher count rates (>10,000 cps) and better resolution (<160eV) compared to traditional proportional counters or pin diodes. This is particularly useful for reducing measuring times, down from 30 seconds to below 10 seconds whilst achieving the same accuracy and precision and therefore enabling us to test more product within the same timescale. The interchangeable filters and collimators also enable us to analyse a wide range of matrices, from delicate precious metal jewellery to catalyst powder samples.

Within the laboratory we have received our new ICP machine. The new Agilent 5800 VDV (Vertical Dual View) ICP-OES System  is configured similar to our current Agilent 5110 ICP-OES, which we purchased a few years ago. However, the new ICP-OES has a new optical component called the free form collimating mirror. This has enabled Agilent to make the instrument a bit smaller whilst improving the sensitivity and detection limits vs the 5110. 

The software has also been improved with new enhancements to the Intelliquant feature. The Intelliquant captures data from entire wavelength range as each sample is measured, then uses this broader view to calculate the approximate concentration in a sample. By collecting more than just the data at the nominated wavelength, Intelliquant sees spectral interferences and provides recommendations to ensure the right answer every time. 

A further addition in the laboratory is an ONH836 analyser which is designed for the simultaneous wide-range of measurement of Oxygen, Nitrogen and Hydrogen contents of  ferrous and nonferrous alloys, refractory and inorganic materials using the inert gas fusion technique. It’s main features include:

• One measurement per sample for 3 different contents ( O, N and H)
• Brand Software designated for touch screen operation which enables the user to have complete access to analysis control, setting, diagnostics and reporting
• Thermostatic construction increases the protection from ambient temperature fluctuations
• Oxygen determination with both CO2 and CO detectors for complete gas characterisation and expanded range
• High -Efficiency cooling system to eliminate/ reduce for external cooling
• Novel electrode design increase heat transfer efficiency

Finally we have also invested in a new Induction Furnace. This is an important area to us, as it enables us to offer confidence to our customers when they send their scrap or unwanted jewellery to us for melting. We also cover a number of other industries with this service. The new furnace will give us the capability of melting both gold and platinum - the melting point required for platinum is in excess of 1,768 degrees and is therefore not a service that as many companies are able to offer.  This will also boost our current capacity.

To find out more or for details on any of your requirements, please contact us on 0114 231 2121 or info@assayoffice.co.uk.

The Sheffield Assay Office was established in 1773, under an Act of Parliament and today the company assays and hallmarks the precious metals - silver, gold, platinum and palladium. Sheffield Assay Office is one of only four UK assay offices who all work to uphold the Hallmarking Act of 1973 and continue to ensure consumer protection for customers purchasing precious metals.

To find out more about the whole range of services offered by Sheffield Assay Office, such as our hallmarking and analytical services, please email us at info@assayoffice.co.uk or complete the contact form on our website at http://www.assayoffice.co.uk/contact-us ,

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