Having spent a lot of money on your new Memmert chamber, it is important to have it regularly checked to ensure it is operating within the tolerances you need. For equipment of this type it is recommended that they are independently calibrated on an annual basis. So what are the options and what do they do?
Single and multi-point temperature mapping helps to ensure that your Memmert chamber...
Let us first look at the probe. The Hach dissolved oxygen probes are equipped with a measuring LED that emits a pulse of blue light and a photodiode as a light detector. The probes are also equipped with a sensitive luminescent coated spot that is exposed to the sample.
The measuring LED emits a pulse of blue light which irradiates the back of the oxygen-sensitive spot. The coating mate...
The LAQUAtwin pocket meter is a simple and compact design that allows accurate direct measurement from a single drop of sample on its unique flat sensor (see image).
LAQUAtwin pen pocket meters are available for seven electrochemistry parameters, including pH, conductivity, various ions (Na+, K+, NO3, Ca2+) and salt concentration. This blog will be focused on pH meter calibration. How...
Nanocolor tube tests are produced by Macherey Nagel and contain pre-dosed reagents housed within a 16mm cuvette. They are designed for ultimate ease of use. They work with a range of Macherey Nagel photometers for water analysis applications. And they even have a barcode on so that you can select the correct test quickly without have to scroll through dozens of options.
With advanced techno...
Turbidity is a measure of the cloudiness of water and is used as a key water quality indicator. This can then be used to quantify the amount of particles disrupting light passing through a liquid. For example, muddy water has a lot of small soil particles. This disrupts light going through it and makes it very cloudy and turbid. However spring water tends not to have many particles in and so is...
SpecCheck standards are solid gel secondary standards produced by Hach. They are for use with their photometers. They are presented in sealed glass cells, so they are ready to use out of the box, with no preparation. Within each pack of standards, 4 vials are provided. One is a blank along with 3 coloured gel standards. They are available for a number of parameters including chlorine...
The Ultrameter II 6PIIfce from Myron L is a versatile, fully waterproof multi-parameter meter, which can measure the following parameters: conductivity, TDS, resistivity, pH, ORP, free chlorine and temperature. The ultrameter has many applications including pool monitoring and measuring the conductivity of ultrapure water.
[caption id="attachment_16092" align="aligncenter" width="175"] Mylon L...
The FOS/TAC ratio is a commonly used indicator for assessing the fermentation process within biogas reactors, where FOS is a measure of the volatile organic acids (measured in mg CH3COOH/l) and is TAC is a measure of the total inorganic carbon i.e. the alkaline buffer capacity of the system (measured in mg CaCO3/l). In simple terms, this ratio looks at acid vs alkaline in the system which helps...
A: By using a colostral refractometer [caption id="attachment_15311" align="aligncenter" width="300"] An optical refractometer used for determining colostrum quality[/caption] Colostrum milk is the first type of milk produced by mammals in the very late stages of pregnancy and immediately after giving birth. This has a high importance in the livestock industry as colostrum milk is a...
[caption id="attachment_2586" align="aligncenter" width="285"] Jenway 370 pH meter[/caption]
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Many pH meters also have a separate reading range which gives results in mV. This can be used for a range of applications.
1.) Checking your pH electrode calibration. Most meters automate the calibration of pH which makes it simple to perform and ensures consistency in results. However, when issues ar...
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/...
[caption id="attachment_9145" align="alignright" width="150"] PH Meter[/caption]
pH meters are wonderful devices until they go wrong. You are then left with your sample sitting on the bench and in some instances, not knowing what is wrong. The following questions and answers are designed to help you diagnose the problem.
My pH meter won't give a fixed reading – is drifting or providing erratic...
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I came across your article about "DPD Tablets" on Camlab Info, and it's a valuable resource for anyone seeking information about water testing and analysis using DPD tablets. Your explanation of their usage and significance in water quality monitoring is quite informative.
This article on nanocolor tube tests is a gem for analytical enthusiasts. The idea of zero calibration is intriguing, and your detailed explanation makes it accessible. The step-by-step process helps demystify the technique for beginners like me. The use cases you've highlighted, particularly in...
Grant have introduced the new Controlled Rate Freeze Thaw (CRFT), which is a liquid nitrogen and cryogen free controlled rate freeze and thaw system for cryopreservation in a wide range of applications. Cryopreservation is a process where biological materials such as cells, tissues...
A dipslide is a means of testing the microbial content of liquids. This is a common method of monitoring and measuring microbial activity within many systems and commonly cooling systems. Usually the use of a dipslide is the first line of defence for the testing of microbial issues that could be...
Purchasing items using donated funds without the burden of VAT will now save many Millions of pounds each year which can be put to better use in advancing scientific knowledge to provide new treatments and cures that will shape the medicines of the future.
Working with pressure/vacuum conditions in the lab is common but not all products are designed to withstand this. Products with appropriate geometry and wall thickness are suitable for working safely with pressure. For example, filtering flasks, desiccators, or flat flange vessels, as well as...
