analytical chemistry
111Anal. chem. — Analytical Chemistry Analytical Chemistry   Titre abrégé Anal. Chem. Discipline Chimie Langue anglais Directeur de publication Royce W. Murray …
112surface analysis — ▪ chemistry Introduction in analytical chemistry (chemistry), the study of that part of a solid that is in contact with a gas or a vacuum. When two phases of matter are in contact, they form an interface. The term surface is usually… …
113electrochemical reaction — ▪ chemistry Introduction any process either caused or accompanied by the passage of an electric current and involving in most cases the transfer of electrons between two substances one a solid and the other a liquid. Under ordinary… …
114differential thermal analysis — ▪ chemistry in analytical chemistry, a technique for identifying and quantitatively analyzing the chemical composition of substances by observing the thermal behaviour of a sample as it is heated (heat). The technique is based on the fact… …
115gel chromatography — ▪ chemistry also called Gel Filtration, in analytical chemistry, technique for separating chemical substances by exploiting the differences in the rates at which they pass through a bed of a porous, semisolid substance. The method is… …
116iodine value — ▪ chemistry also called Iodine Number, in analytical chemistry, measure of the degree of unsaturation of an oil, fat, or wax; the amount of iodine, in grams, that is taken up by 100 grams of the oil, fat, or wax. Saturated oils, fats,… …
117isotope dilution — ▪ chemistry radiochemical method of analysis for measuring the mass and quantity of an element in a substance. The procedure involves adding to a substance a known quantity of a radioisotope of the element to be measured and mixing it with… …
118Kjeldahl method — ▪ chemistry in analytical chemistry, procedure widely used for estimating the nitrogen content of foodstuffs, fertilizers, and other substances, invented in 1883 by a Danish chemist, Johan G.C.T. Kjeldahl. The method consists essentially of …
119nephelometry and turbidimetry — ▪ chemistry in analytical chemistry, methods for determining the amount of cloudiness, or turbidity, in a solution based upon measurement of the effect of this turbidity upon the transmission and scattering of light. Turbidity in a liquid… …
120Chemometrics — is the science of extracting information from chemical systems by data driven means. It is a highly interfacial discipline, using methods frequently employed in core data analytic disciplines such as multivariate statistics, applied mathematics,… …
