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Washout Considerations for ICP Analyses

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Calibration Standards for ICP Spectroscopy

Inductively coupled plasma (ICP) spectroscopy is an analytical technique designed to detect and measure elements from chemical samples. As such, it has a range of applications and is especially important in the biomedical and pharmaceutical industry.

ICP spectroscopy is based on the ionization of a sample by plasma, typically generated through the ionization of argon gas by radio frequency energy. Commonly employed in inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP-OES), these two instruments have a number of advantages over comparable technology used for trace element detection. Notably, they allow multiple elements to be measured simultaneously and possess a large analytical range, which outstrips the single element capabilities and limited analytic range of flame atomic absorption and flame atomic emission.

The vital role played by ICP spectroscopy in many industries

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An Introduction to pH Buffer Solutions

If you are interested in carrying out reliable pH measurements, then you are probably well-versed in the differences between acids and bases. However, the fundamentals are important to emergent areas of pH metrology and the importance of pH buffer solutions so we will recap the basics briefly.

Accurate pH Measurements with Buffer Solutions

Formally, the pH value of a substance denotes the negative logarithm of hydrogen ion activity. This is sometimes referred to as the potential, or power, of hydrogen in an aqueous solution. The pH of a solution is expressed on a scale of 0–14 and it is a temperature-dependent property. Pure water, for instance, is largely neutral with a pH of 7.47 at 0°C and 6.14 at 100°C.

Measuring the pH value of a solution is typically done using a potentiometer which – theoretically – produces a 0 millivolt (mV) differential between a sensing and reference electrode at pH 7. Any change in acidity or alkalinity changes the ele

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