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2. Total dissolved solids - Wikipedia

   en.wikipedia.org/wiki/Total_dissolved_solids

   Total dissolved solids ( TDS) is a measure of the dissolved combined content of all inorganic and organic substances present in a liquid in molecular, ionized, or micro-granular ( colloidal sol) suspended form. TDS are often measured in parts per million (ppm). TDS in water can be measured using a digital meter.

3. Thermal desorption spectroscopy - Wikipedia

   en.wikipedia.org/wiki/Thermal_desorption...

   Temperature programmed desorption (TPD) is the method of observing desorbed molecules from a surface when the surface temperature is increased. When experiments are performed using well-defined surfaces of single-crystalline samples in a continuously pumped ultra-high vacuum (UHV) chamber, then this experimental technique is often also referred to as thermal desorption spectroscopy or thermal ...

4. Electrodialysis - Wikipedia

   en.wikipedia.org/wiki/Electrodialysis

   Electrodialysis. Electrodialysis ( ED) is used to transport salt ions from one solution through ion-exchange membranes to another solution under the influence of an applied electric potential difference. This is done in a configuration called an electrodialysis cell. The cell consists of a feed (dilute) compartment and a concentrate ( brine ...

5. Tetraethyl orthosilicate - Wikipedia

   en.wikipedia.org/wiki/Tetraethyl_orthosilicate

   Tetraethyl orthosilicate, formally named tetraethoxysilane ( TEOS ), ethyl silicate is the organic chemical compound with the formula Si (OC 2 H 5) 4. TEOS is a colorless liquid. It degrades in water. TEOS is the ethyl ester of orthosilicic acid, Si (OH) 4. It is the most prevalent alkoxide of silicon.

6. Assay - Wikipedia

   en.wikipedia.org/wiki/Assay

   Assay. An assay is an investigative (analytic) procedure in laboratory medicine, mining, pharmacology, environmental biology and molecular biology for qualitatively assessing or quantitatively measuring the presence, amount, or functional activity of a target entity. The measured entity is often called the analyte, the measurand, or the target ...

7. Gas chromatography–mass spectrometry - Wikipedia

   en.wikipedia.org/wiki/Gas_chromatography–mass...

   Gas chromatography–mass spectrometry. Gas chromatography–mass spectrometry ( GC–MS) is an analytical method that combines the features of gas-chromatography and mass spectrometry to identify different substances within a test sample. [1] Applications of GC–MS include drug detection, fire investigation, environmental analysis, explosives ...