Sodium's chemistry means that you cannot measure it's concentration with a simple test kit or reagent and photometer combination, like you would with many other water quality parameters. There are a number of available options (read more here). But using an ISE is the most commonly used within the water testing industry.
ISE measurements can be a tricky method to master and relies careful ...
[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/...
Testing for Sodium is often required in food or blood samples. Some water samples may need to be tested, particularly those where a softening system is used. Due to the nature of sodium's chemistry, it cannot be tested by a simple test kit method. We've taken a look at why this is, and explored what options are available for testing sodium. [caption id="attachment_8317" align="aligncenter" wi...
Nitrate is a naturally occurring substance in the environment and is commonly found in most water sources, it is usually only a cause for concern in areas where water supplies can be affected by farm runs offs and agriculture, its use as a fertiliser can cause increased levels in water supplies The UK safe limit for nitrates in Drinking water is 50mg/l as described in the current advice on Nit...
[caption id="attachment_2628" align="alignleft" width="480" caption="Hach HQD meter"][/caption]
Whats the difference between a Hach HQ30D and Hach HQ40D?
The Hach HQ meters are digital meters for the analysis of pH, Conductivity, Dissolved Oxygen, ORP and Ion specific electrodes. Two portable models are availa...
Can I measure Fluoride on my pH meter?
Fluoride can be measured on an Ion Selective Electrode (ISE). The ion selective electrode generates a signal which is the same as that generated in a pH measurement. In simple terms if the pH meter can measure mV and well as pH then the meter can be used to make an ISE measurement.
To do this with a pH meter the user will have to generate a from the gra...
What is an ISE - Ion Selective electrode?
[caption id="attachment_2116" align="alignleft" width="557" caption="Half Cell ISE"][/caption]
An ion-selective electrode (ISE) is an electrode that measures the activity of a specific ion dissolved in a solution into an electrical potential which can be read on a meter. The sensing part of the electrode is usually made of an ion-specific membrane...
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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.
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