The electrode is the key to successful analysis. Since the electrode is the only part of the analytical instrument that is in direct contact with the sample, its selection and maintenance has the strongest influence on precise and accurate measurements. However, a pH electrode that has been correctly selected and that has been working properly may nevertheless suddenly start performing badly. Below are guides to help you chose the right electrdoe for each application.
Electrodes are one of the most important parts of the any pH measuring system. In order to ensure you have the most accurate and precise results extra care need to be taken over the unpacking, storage, cleaning and maintenance. Below are some videos to guide you through this process.
Unpacking and Quality Check
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Electrode Preparation before measurement
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Measuring pH correctly
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pH Electrode Cleaning
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Electrode Storage
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Troubleshooting pH electrode issues
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TRIS buffers, which are often present in biological samples can cause challenges in pH measurement. The interaction between classic electrolyte solutions and the key components of the TRIS base leads to junction blockage and shortened sensor lifespan. Selection of the appropriate reference system can allow improved sensor accuracy and extended lifetime. Measuring pH in protein-containing samples can be challenging as protein can foul both the pH sensing glass and classical ceramic junctions. In order to obtain accurate pH readings, both of those components must be maintained in optimal condition.
Application note on measuring in TRIS
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Application note on measuring protein samples
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Application note on measuring on Agar Plates
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Food and drinks are a crucial part of everyday life. In order to ensure the maximum safety and regulatory requirements correct testing is paramount. Here are a number of application guides for food and drink samples that each require a specific electrode or method to measure accurately and precisely.
Application note on measuring in Fruit Juice
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Application note on measuring in Yoghurt
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Application guide on measuring in Milk
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Application guide on measuring in Wine
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Application guide on measuring in Fruit & Vegetables
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Application guide on measuring in Meat
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pH meters come with a variety of settings and applications, along with the need to calibrate on a regualr basis. This page this page can guide you through this process along with any additional needs like insatllation and PC connections.
SevenDirect™ Benchtop Meters by METTLER TOLEDO. Developed for a wide range of applications, SevenDirect benchtop meters provide accurate pH, ion concentration, and conductivity measurements of almost any sample. They are easy to use, with data handling options and robustness that will delight discerning users.
SevenDirect™ How-to (1/6): pH Meter Installation and Setup
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SevenDirect™ How-to (2/6): Basic pH Meter Operation
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SevenDirect™ How-to (3/6): pH Verification Process
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SevenDirect™ How-to (4/6): EasyDirect pH Software
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SevenDirect™ How-to (5/6): Efficient pH Calibration
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SevenDirect™ How-to (6/6): Accurate pH Measurements
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With a compact design and intuitive operation, the FiveEasy benchtop meter from METTLER TOLEDO offers quality measurement for the budget-minded. These how-to videos will walk you through the step-by-step process of unboxing and setting up your FiveEasy meter for the first time. With intuitive operation, the FiveEasy is ready to perform measurements quickly. Use this step-by-step guide to simplify the process even further!
FiveEasy How-To (1/3): pH Meter Installation and Setup
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FiveEasy How-To (2/3): pH Calibration
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FiveEasy How-To (3/3): pH Measurement and Maintenance
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METTLER TOLEDO is a leading global manufacturer of precision instruments and services for use in laboratories and manufacturing. Lab pH Instruments, pH and Conductivity Measuring Solutions for Laboratory and Field Applications Electrochemistry systems provide accurate measurements of pH, conductivity, ion concentration, ORP/redox and dissolved oxygen. Pair our meter with one of our high-quality sensors, calibration solutions, and analytical software to complete your measuring solution.