Articles by Emma Atkin

Articles by Emma Atkin

How can I measure Turbidity?
Loading...
1139 view(s)

How can I measure Turbidity?

Turbidity measures the cloudiness/haziness of a fluid. It is a key test for water quality, turbidity is caused by particles of varying size scattering/absorbing the light and creating a cloudy appearance. The turbidity of a sample will increase with the amount of undissolved solids present. Turbidity Tubes and Secchi Disks The simplest and lowest cost way to measure the turbidity of a sample ...
Haemocytometer
Loading...
107 view(s)

How is a metallized Haemocytometer different to a standard one?

A Haemocytometer is a widely used device for visually counting the number of cells in a blood sample or other fluid under a microscope. It consists of a thick glass microscope slide with a gridded indentation that creates a H shaped chamber, contact of a flat cover slip on top produces an exact volume of fluid over the counting area. By counting the number of cells or particulates in one partic...

Turbidity reading
Loading...
133 view(s)

Why is my turbidity reading higher/lower than expected?

For an accurate measurement of turbidity a sample vial is placed in an nephelometer meter called a turbidimeter or turbidity meter. The meter emits a known intensity of light through the sample cell and the scattered light is measured at 90 degrees to the light source to give a turbidity reading in units NTU (nephelometric turbidity units) or FTU (formazin turbidity units). There are a range...

Heated Ultrasonic Bath
Loading...
107 view(s)

Question. Should I use a heated ultrasonic bath?

Answer: Ultrasonic cleaning is used in a wide range of applications to effectively and efficiently remove contamination such as dirt, grease, and other residues from components and products. Elma Gmbh have created and developed a range of powerful ultrasonic cleaners, each with their own range of machine functions and accessories designed for use in various applications from parts cleaning to e...

Ion Selective Electrode Meter
Loading...
80 view(s)

How to calibrate an Ion Selective Electrode Meter

Proper calibration of ion selective electrode (ISE) meters is vital to ensure accurate results. Here are some top tips for calibration: Calibration standard concentrations should bracket your expected sample - you should use at least 2 standard calibration standards which bracket the expected concentration of your sample, and these concentrations should be decades apart e.g. 0.1mg/L and 1mg/...

Colloidal Iron
Loading...
36 view(s)

How can I measure the amount of colloidal iron in my sample?

Colloidal iron is precipitated iron in water that cannot be easily filtered due to the fact it consists of extremely small iron particles that do not clump together in solution. Here is a method in quantifying the amount of colloidal iron in a sample using an iron pocket colorimeter. To measure the amount of dissolved iron you have in your sample start by filtering your sample to remove...

Measuring Dissolved Oxygen in Wine
Loading...
19 view(s)

Measuring Dissolved Oxygen in Wine

Oxygen can dissolve into wine throughout production causing wine oxidation which in small amounts can be beneficial to some varieties such as red wines, but in large amounts can shorten the wine's life and lower the quality. Being able to measure the dissolved oxygen throughout wine production allows the winemaker to control and influence the amount of oxygen exposed to each variety before bott...

pH in wine
Loading...
4 view(s)

Why is measuring the pH in wine making important?

Ben studied Oenology and Viticulture at Plumpton college and now with his wife Hannah run Flint Vineyard in the beautiful Norfolk countryside. Throughout the wine production process the pH is tested; from measuring the grapes to decide when they are ready to ...

v
Loading...
38 view(s)

What type of electrode should I use to measure Dissolved Oxygen?

Quite simply, dissolved oxygen (DO) is free (non-compound) oxygen present in water. Oxygen dissolves by diffusion from the surrounding air, gained by aeration from turbid water or a waste product of photosynthesis. DO is vital to maintain aquatic life from fish to plants to bacteria and thus an important parameter to be able to measure. There are many factors to take into account when ch...

Measuring chlorine in water
Loading...
235 view(s)

Measuring high levels of free chlorine in water

Measuring high levels of free chlorine can be problematic; Colorimeters used to test free chlorine are based on a colour change test; The DPD 1 (N,N-diethyl-p-phenylenediamine) method for residual chlorine was first introduced by Palin in 1957. Over the years it has become the most widely used method for determining free chlorine in water and wastewater. Hach introduced its first Chlorine te...

Redox Potential
Loading...
284 view(s)

How to measure a Redox Potential

What is a Redox Potential? Oxidation Reduction Potential (ORP or REDOX Potential) measures an aqueous system's capacity to either release or accept electrons from chemical reactions. When a system tends to accept electrons it is an oxidizing system. When it tends to release electrons, it is a reducing system. When are Redox measurements required? There are a number of different reasons...

Data Loggers
Loading...
15 view(s)

How to get your data loggers calibrated for temperature, humidity and pressure

With over 65 years of experience in scientific instrumentation and having our own factory trained internal and field-based service engineers located across the UK, Camlab is a name you can trust for maintenance services, repairs and calibration. Camlab holds ISO 9001, ISO 14001 and ISO 18001 accreditation, as well as being SafeContractor approved. We are committed to providing the highes...

Loading...