Water purifcation

Welcome to Camlab's comprehensive list of blogs on the subject of water purification, where we bring you the latest insights and developments in the world of lab water treatment. As a leading provider of laboratory supplies, Camlab understands the importance of producing high-quality water for scientific experiments and applications. Our blogs cover a range of topics, from the various methods of water purification to the importance of maintaining lab water quality standards. Whether you're a researcher, scientist, or lab technician, our blogs are designed to help you stay informed and up-to-date in the field of water purification. Explore our collection of blogs on lab water and water treatment today.

Suspended solids
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What is Suspended Solids?

What is Suspended Solids? [caption id="attachment_2055" align="alignleft" width="313"] Suspended solids[/caption] Suspended solids refers to small solid particles which remain in suspension in water. It is used as one indicator of water quality, typically for wastewater applications and is used as part of the Charging system for trade effluent in the UK using the Mogden formula. It is ...
Water Still
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High-Quality Pyrex Glass Components in a Water Still

SciLabware's Quickfit range has introduced a new QWS4 Water Still. Manufactured in the UK, the QWS4 is the only water still on the market made with high-quality Pyrex glass components - for its boiler and condenser. The QWS4 produces around 4 litres/hour of pyrogen-free* distilled water. Its chromium plated 3kW heating element is fitted with two thermostats to protect from overheating in the e...
Distilled and deionised water
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What's the difference between distilled and deionised water?

"Pure" water is used in all types of laboratories for a range of uses - from making up calibration standards to cleaning and even in the rinse cycle in some laboratory glasswashers for a pure clean. There are different types of purified water available - but what is the difference? [caption id="attachment_6355" align="aligncenter" width="300"] Distilled or deionised water? What's the differe...
W4000 Bibby Merit Water Still
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How to install the W4000 Bibby Merit Water Still

The W4000 Bibby Merit Water Still is a great option for labs needing small quantities of distilled water. The still connects to a basic mains water supply and allows you to generate 4L per hour of distilled water compliant with European Pharmacopoeia and ASTM Type 4 [caption id="attachment_11833" align="alignleft" width="300"] A fully assembled W4000 Water Still[/caption] The still arr...
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What is the pH of distilled water?

Purified water from distillation, deionisation or reverse osmomsis purification systems will usually have an acidic pH. But why is the pH of distilled water not neutral pH 7? This does not mean the water is contaminated - we've taken a look at the chemistry that explains the acidity. [caption id="attachment_8125" align="aligncenter" width="374"] Deionised (DI) or distilled water often has an...
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How do I measure suspended solids? How is the gravimetric method different to other methods?

The measurement of Suspended Solids is often required for discharge consent, and values may be reported to the Environment Agency (EA). [caption id="attachment_8215" align="aligncenter" width="200"] Suspended solids give water a cloudy appearance[/caption] There are several methods for testing the suspended solids present in a water sample, here we discuss the differences between the differen...

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How can I check my deionised (DI) water?

Laboratories using a deioniser system to generate deionised (or DI) water in house should test the water produced regularly, to ensure the system is working well and producing water of the required purity. [caption id="attachment_8125" align="aligncenter" width="300"] How can you test your DI water is pure enough?[/caption] Conductivity is usually used as a good indicator of the quality, ...

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Are Instachlor tablets suitable for use in drinking water? What approvals do Instachlor tablets have?

Q: Can I use Instachlor tablets to treat drinking water? What approvals or standards do the tablets meet? [caption id="attachment_7881" align="aligncenter" width="444"] Instachlor tablets for sterilizing water by chlorination[/caption] A: Yes - Instachlor tablets are compliant with the BS EN 12931 standard, for chemicals used to treat water for human consumption. The Instachlor tablet...

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High range chlorine testing - what are the options?

Higher range chlorine solutions are typically used for disinfecting products but standard chlorine meters often cannot measure to higher ranges. For example the Hach Pocket Colorimeter II for chlorine measures to a maximum of 2mg/L, and the MD100 Duo for Chlorine measures to a maximum of 8mg/L There are several instruments available for samples where chlorine levels are high, lets take a ...

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How can I measure temporary and permanent water hardness?

Hard water is water with high levels of dissolved minerals, and usually occurs in areas where limestone and chalk are common. These minerals can be divided into two types, and so hardness is often considered in two categories - permanent and temporary water hardness. [caption id="attachment_7029" align="aligncenter" width="350"] Hard water causes deposits on heating elements, but can also...

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What is TDS?

Answer: Total Dissolved Solids (TDS) is a measure of the combined content of all the inorganic and organic substances such as mobile charged ions, minerals, salts or dissolved metals in a volume of liquid. Normally TDS is used in water testing, where TDS is defined as anything present that is not pure water (H2O) molecule or suspended solids. Finding out the exact amount of TDS in water ...

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What's the difference between free and total chlorine?

Most methods of measuring chlorine in water refer to free and total chlorine, but what exactly do these mean and what is the difference?  Measuring Chlorine with a Pocket Colorimeter The element Chlorine exists as a gas Cl2, when this is mixed with water it forms hypochlorous acid (HOCl) which is the disinfecting agen...

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