TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Atomic absorption spectrochemical analysis is used for [the] determination of trace metals. Because of high sensitivity, high selectivity, and easy operation, atomic absorption spectrochemical analysis is an important analysis method of heavy [metals] in water, soil, and biological samples.  1, record 1, English, - atomic%20absorption%20spectrochemical%20analysis

Record 1,  Textual support,  French

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 CONT

Anodic stripping voltammetry is a method to demonstrate the presence of multiple metals in water. This method is usually applied to investigate the water quality of surface or drinking water or sewage.  3, record 2, English, - anodic%20stripping%20voltammetry

Record number: 2, Textual support number: 2 CONT

Anodic stripping voltammetry(ASV) is the most common of a class of techniques known as stripping electroanalytical methods(SEAM). The defining characteristic of these methods is the preconcentration of analyte at the electrode surface in order to lower the detection limit for that analyte.... Usually a mercury drop or mercury thin-film electrode is employed under forced convective conditions(stirred solution). The preconcentration step is followed by a short time period in which the solution is allowed to quiet(no stirring), following which a potential scan is initiated from the deposition potential in the anodic direction. ASV is well-suited for the determination of trace amounts of many metal contaminants. “Stripping” refers to the characteristic sharp voltammetric waves that occur for metals as they are oxidized out of mercury, in which many metals form amalgams.  2, record 2, English, - anodic%20stripping%20voltammetry

Record 2,  Textual support,  French

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 OBS

Term(s) taken from a Canadian laboratory-equipment company’s catalogue.  1, record 3, English, - trace%20metals%20determination

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 OBS

Terme(s) tiré(s) du catalogue d'une compagnie canadienne d'équipement de laboratoire.  1, record 3, French, - dosage%20de%20m%C3%A9taux%2Dtraces

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 CONT

X-ray powder diffraction is used in the identification of crystalline phases in unknown samples, finding the lattice parameter and other lattice related information, quantitative determination of phases in multiphase samples, finding the orientation in single crystals, and stereographic projections. The samples must be crystalline solids such as metals, ceramics, rocks etc. These samples are usually about 1 mg in size. If the sample fits in the sample holder then there is no preparation necessary otherwise the sample may have to be crushed in order to fit. The sample takes less than one hour to be analyzed for qualitative analysis in major phases and up to 16 hours for trace phases. The quantitative analysis can take several minutes to several hours after set up. There are several detectors used in XRPD varying from films to cameras to diffractometers.  1, record 4, English, - x%2Dray%20powder%20diffraction

Record number: 4, Textual support number: 2 CONT

Powder X-Ray Diffraction. Powders of crystalline materials diffract X-Rays. A beam of X-rays passing through a sample of randomly-oriented micro-crystals produces a pattern of rings on a distant screen. Powder X-Ray diffraction provides less information than single-crystal diffraction, however, it is much simpler and faster. Powder X-Ray diffraction is useful for confirming the identity of a solid material and determining crystallinity and phase purity. Modern powder X-Ray diffractometers consist of an X-Ray source, a movable sample platform, an X-Ray detector, and associated computer-controlled electronics. The sample is either packed into a shallow cup-shaped holder or deposited as a slurry onto a quartz substrate, and the sample holder spins slowly during the experiment to reduce sample heating. The X-Ray source is usually the same as used in single-crystal diffractometers, Mo or Cu. The X-Ray beam is fixed and the sample platform rotates with respect to the beam by an angle theta. The detector rotates at twice the rate of the sample and is at an angle of 2 theta with respect to the incoming X-Ray beam.  4, record 4, English, - x%2Dray%20powder%20diffraction

Record number: 4, Textual support number: 3 CONT

Fine particles such as clays must be separated from larger particles and measured separately if they are to be detected properly. To reduce errors associated with preferred orientation of minerals, samples are most commonly ground to a powder before analysis, a technique known as powder X-ray diffraction.  4, record 4, English, - x%2Dray%20powder%20diffraction

Record number: 4, Textual support number: 4 CONT

X-ray powder diffraction (XRD) is a direct method for qualitative and quantitative characterization of fine-grained materials such as clinker and cement, and may also be used for analysis of raw materials. Each phase produces a unique diffraction pattern independent of others, with the intensity of each pattern proportional to that phases concentration in a mixture.  5, record 4, English, - x%2Dray%20powder%20diffraction

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

Diffraction de rayons sur poudres : analyse quantitative de composés modèles du ciment anhydre. [...] Ce stage sera consacré à la caractérisation par diffraction des rayons X de mélanges d'alites de synthèse M1 et M3. La méthode expérimentale utilisée sera la diffraction des rayons X sur poudres jointe aux autres méthodes de laboratoire associées.  1, record 4, French, - diffraction%20de%20rayons%20X%20sur%20poudres

Record number: 4, Textual support number: 2 CONT

À l'aide de la diffraction de rayons X de poudres, différentes formes polymorphiques peuvent être détectées pour des molécules à activité pharmacologique.  2, record 4, French, - diffraction%20de%20rayons%20X%20sur%20poudres

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 OBS

Fisheries and Oceans Canada. Series: Canadian technical report of hydrography and ocean sciences, 133.  1, record 5, English, - Determination%20of%20trace%20metals%20in%20estuarine%20sediment%20pore%20waters%20containing%20high%20concentrations%20of%20iron

Record 5,  Textual support,  French

Record 5,  Textual support,  Spanish