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Selenium (Se)
Amorphous selenium ([Ar]3d104s24p4) (CAS 7782-49-2) is either a reddish powder or a black, vitreous solid; crystalline selenium is either red or gray, depending on the crystal structure. This element resembles sulfur in its various forms and in its compounds. Selenium has many electrical properties, being both photovoltaic, where light converts to increased illumination. Below its melting point, selenium is a p-type semiconductor.
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This Thermo Scientific Chemicals brand product was originally part of the Acros Organics product portfolio. Some documentation and label information may refer to the legacy brand. The original Acros Organics product / item code or SKU reference has not changed as a part of the brand transition to...
This Thermo Scientific Chemicals brand product was originally part of the Alfa Aesar product portfolio. Some documentation and label information may refer to the legacy brand. The original Alfa Aesar product / item code or SKU reference has not changed as a part of the brand transition to Thermo...
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US EPA Method 200.7 is the "Determination of Metals and Trace Elements in Water and Wastes by Inductively Coupled Plasma-Atomic Emission Spectrometry." EPA 200.7 sets the method detection limit (MDL) for 31 different elements, along with preferred wavelengths and calibration and quality control...
US EPA Method 200.9 is the "Determination of Trace Elements by Stabilized Temperature Graphite Furnace Atomic Absorption (GFAA)." This regulatory method is for analyzing 16 dissolved and total recoverable elements in ground water, surface water, drinking water, storm runoff, industrial and domestic...
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