A2 Workplace Health & Safety Wallcharts

Electric shock first Aid SAT0074Office Safety SAT0076Chemical Spill First Aid SAT0086

Looking for A2 Workplace health & safety posters?  We’ve got a wide selection, all currently on offer.

Save 20% now.  Just quote the item code for the poster required and mention the offer.

Raise awareness throughout your organisation.

Each wallchart features fully coloured illustrations and clear, easy to follow text.

Clear step by step instructions with encapsulated finish for superior durability

Download the flyer here to see the full range

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Reagent/Media Bottles

Special Offer pricing available for Fisherbrand reagent/media bottles.

Re-usable borosilicate glass with pouring ring and polypropylene cap.  Autoclavable.

reagent/media bottle

Example price – 250ml capacity, pack of 10 – Only £18.80

Example price – 1000ml capacity, pack of 10 – Only £30.00

The flyer gives the full range available.  Offer is valid until 31st August 2018 only.  Quote REAGENT to qualify.

Click here to download the flyer.

autoclavable bottle and cap

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Chemical Special Offer

SPECIAL OFFER ON CHEMICALS – VALID UNTIL 31ST AUGUST 2018

Total Lab Supplies are running a special offer on a select range of chemicals.  These include commonly used HPLC chemicals as well as some acids.  We can offer a wide range of chemicals from general purpose reagents through to analytical grades and more.  We offer ultra pure chemicals for specialist analysis work and offer a range of fine chemicals.

chemicals, HPLC, acids, meth spirit, water

Please download the flyer for more information and to take advantage of the special prices.

Offer is valid until 31st August 2018

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On this day in history

On July 29th in 1927, the first iron lung (electric respirator) was installed at Bellevue hospital in New York for the post war polio epidemic. The first iron lung was developed at Harvard University by Phillip Drinker and Louis Agassiz Shaw built with two vacuum cleaners. The iron lung is a negative pressure machine which surrounds the patient’s body except for the head, and alternates a negative atmospheric pressure with the ambient one, resulting in rhythmic expansion of the chest cage (and thus inhalation) in response to the negative extra thoracic pressure. During periods of ambient extrathoracic pressure, the lungs deflate. This type of machine is rarely used today.

The first patients of the iron lung were polio sufferers with chest paralysis.

Historically, in 1670, John Mayow demonstrated that air is drawn into the lungs by enlarging the thoracic cavity. He built a model using bellows inside which was inserted a bladder. Expanding the bellows caused air to fill the bladder and compressing the bellows expelled air from the bladder. This was the principle of artificial respiration called “external negative pressure ventilation” or ENPV that would lead to the invention of the iron lung and other respirators.

For more information visit https://en.wikipedia.org/wiki/Iron_lung

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Ultrasonic Baths

An ultrasonic cleaner is a cleaning device that uses ultrasound (usually from 20–400 kHz) and an appropriate cleaning solvent (sometimes ordinary tap water) to clean delicate items. The ultrasound can be used with just water, but use of a solvent appropriate for the item to be cleaned and the soiling enhances the effect. Cleaning normally lasts between three and six minutes, but can also exceed 20 minutes, depending on the object to be cleaned.

Ultrasonic cleaning penetrates even microscopic openings to provide complete cleaning of the objects treated. This makes it one of the most effective, economical and powerful cleaning methods available. It has applications in laboratories, dental and medical technology, microelectronics, precision engineering, cosmetics, optics and the automotive industry. Ultrasonic cleaners are used to clean many different types of objects, including jewellery, lenses and other optical parts, watches, dental and surgical instruments, tools, coins, fountain pens, golf clubs, window blinds, firearms, musical instruments, industrial parts and electronic equipment. They are used in many jewellery workshops, watchmakers’ establishments, and electronic repair workshops

Modern baths tend to have a heavy duty ultrasonic generator which ensures that the ultrasonic output remains constant, regardless of the bath temperature, fill level and cleaning material. This feature guarantees consistent and reproducible cleaning results. ‘Frequency sweeping’, a frequency modulation of the ultrasonic output generated, prevents ‘standing waves’ from being generated and ensures extremely homogeneous energy distribution in the cleaning bath.
Ultrasonic bath
Ultrasonic cleaning uses Cavitation bubbles induced by high frequency pressure (sound) waves to agitate a liquid. The agitation produces high forces on contaminants adhering to substrates like metals, plastics, glass, rubber, and ceramics. This action also penetrates blind holes, cracks, and recesses. The intention is to thoroughly remove all traces of contamination tightly adhering or embedded onto solid surfaces. Water or other solvents can be used, depending on the type of contamination and the workpiece.
There are various ways to test the level of ultrasonic activity within an ultrasonic bath..

There are a number of recommended tests for establishing levels of ultrasonic activity in the bath.

The foil test involves suspending a strip of foil into various locations around the tank. The foil should not touch the base of the tank and should be held in position for around 1 minute. It should then be removed and there should be an even distribution of perforations and small holes on the surface of the foil.

Another test requires the use of Brownes soil test strips. These are plastic strips which have been contaminated to simulate the contamination which might affect surgical instruments. After running an ultrasonic cycle the strips should be taken from the bath and all contamination should have been removed.

An ultrasonic energy meter can also be used to test the level of ultrasonic activity within the tank.

For help and advice on Ultrasonic baths get in touch.
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Clinell Infection Prevention and Control

Available from Total Lab Supplies, the Clinell product range combines innovative technology with ease of use providing the laboratory industry with the most effective infection control solutions available.

Improved cleaning and disinfection of room surfaces decreases the risk of healthcare-associated infections and in a laboratory cleanliness is everything.

Universal wipes
Clinell wet wipes consistently deliver a stable, effective dose of disinfectant which has been tested and proven to kill microorganisms within realistic contact times and conditions, unlike solutions, sprays and dry wipes.

clinell sanitising gel

Download the flyer for full details.  We have a range of wipes available at discounted prices for a limited time.  We have the green Clinell Universal Wipes available from £6.50, their antibacterial range of hand wipes, sporicidal wipes, alcohol wipes and hand sanitising gel.

Click here to download

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Why is milk white?

Milk is mostly made up of water, with smaller amounts of fat, protein, minerals, and other compounds. Fats and water don’t usually mix, but in milk the fat and water form an emulsion. It is also a suspension of a multitude of different proteins in water.

In milk, proteins cluster together to form structures called micelles. These clusters grow from small clusters of calcium phosphate, which help hold them togetherThere are a number of different models of these micelles, with the exact structure still being subject to scrutiny.
 
It’s the protein micelles which give milk its white appearance. The micelles are on average about 150 nanometres in diameter, and this very small size means they are able to scatter light that hits them. The overall effect of this scattering by the huge number of micelles in milk is that it looks white.
 
For a fuller explanation and for more information please visit:-
http://www.compoundchem.com/2018/06/02/milk/
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Care and Storage of pH Electrodes

The life of a pH electrode is not infinite. A number of factors affect the life span of a pH electrode. The higher the temperature that the electrode is used at, the more extreme the pH, how often the bulb dries out and needs to be rehydrated, how roughly it is used; all these factors and more shorten the life span of an electrode. An electrode that is well maintained and cared for can last up to 2 years, one that is not well maintained will not last as long, and one that is well maintained will not last significantly longer.

Storage of the pH electrode when not in use.

The pH electrode bulb needs to be moist at all times. When you are done with the electrode pour electrode storage solution into the cap that came with the electrode and put the cap over the bulb of the electrode. Keep the cap on until next use. If the electrode is being stored for a long time you may want to check the cap to be sure the storage solution is still in the cap and keeping the bulb moist. DO NOT STORE THE pH ELECTRODE IN DISTILLED WATER. Storing the pH electrode in distilled water will shorten the life of your pH electrode.

 

If you do not have electrode storage solution use pH 4 buffer solution. If you have neither electrode storage solution or pH 4 buffer solution you can use pH 7 buffer solution for a short time.

 

Rinsing the pH electrode between measurements.

You should rinse your pH electrode between measurements. This can be done with distilled water or rinsing with a sample of the next solution to be measured. Using both distilled water and then a sample of the next solution is also a good way to rinse the pH electrode between measurements.

 

pH electrode fill hole

Some pH electrodes have a fill hole for refreshing the electrolyte in the pH electrode; other pH electrodes do not have a fill hole. If your pH electrode has a fill hole the fill hole cap should be removed during calibration and use. This allows for the correct amount of reference electrolyte to flow into the sample. Replace the fill hole cap when done with the electrode at the end of the day

If bulb dries out, soak electrode bulb in pH 7

pH electrode bulbs should be keep moist at all times. When not in use the pH electrode bulb should be keep moist by pouring electrode storage solution in the cap provided. If the pH electrode bulb does dry out, soak it in pH 7 buffer for a couple of hours before calibrating or taking measurements.

 

Do not wipe the pH electrode with a cloth or any other type of material.

When you are done with the pH meter rinse off the electrode with distilled water, put storage solution in the cap, and put the cap on the end of the pH electrode as described above. If the electrode is wet do not dry it off, let the distilled water evaporate by itself.

 

Cleaning the pH electrode

The pH electrode needs to be cleaned in order to prevent build up of material on the surface of the glass bulb. How often it needs to be cleaned depends upon frequency of use and the material being tested. An electrode used on dark coloured and viscous material usually needs to be cleaned more often than an electrode used on clear thin material.  Material building up on the glass bulb of the electrode will cause the calibration of the electrode to be inaccurate and any subsequent reading to be inaccurate. Follow the instructions supplied with the electrode cleaning solution when cleaning the electrode bulb.

 

Total Lab Supplies offer a wide range of electrodes, storage solutions, buffers and other associated accessories from all major manufacturers including Hanna Instruments, Mettler Toledo, Sentek, Jenway, Schott, WTW etc…

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More than heat!

Nabertherm have been developing and producing industrial furnaces for many different applications for over 60 years.  Short delivery times are ensured due to complete inhouse production and their wide variety of  standard furnaces.

Nabertherm furnace

Nabertherm LVT 9/11

Total Lab Supplies work in association with Naberthem to ensure you get the right furnace for your application.  Ashing furnaces, chamber furnaces, melting furnaces, clean room solutions and much more including various kilns for pottery, fusing glass and enamelling.

Furnace

Get in touch with your requirements and we can provide more information.  Download the FULL flyer here.Nabertherm 2018

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Hydranal ™ Available from Total Lab Supplies

Hydranal ™ reagents for Karl Fischer (KF) titration have been recognised as the most trusted brand in the industry and are available from Total Lab Supplies.

The Hydranal Center of Excellence has secured the accreditation as test laboratory according to ISO/IEC 17025 and the accreditation as reference material manufacturer according to ISO Guide 34. With this double accreditation, we are part of a select group of laboratories worldwide that can guarantee the highest level of certified quality.

Download the brochure here

Volumetric KF Titration, Coulometric KF Titration, Water Standards, CRM Water Standards, Auxilliaries for KF Titration and more.

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