Examples of using Mobile phase in English and their translations into Russian
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Reversed-phase chromatography employs a polar(aqueous) mobile phase.
Another important factor is the mobile phase pH since it can change the hydrophobic character of the analyte.
For an analyte to be detected it must be less volatile than the mobile phase.
The retention volume VR(the mobile phase volume at which 50% of the compound has been eluted from the column) can be calculated as follows.
Gradient elution uses this effect by automatically reducing the polarity andthe surface tension of the aqueous mobile phase during the course of the analysis.
If a less-dense mobile phase is used it will rise through the stationary phase; this is called ascending mode.
The retention can be decreased by adding a less polar solvent(methanol,acetonitrile) into the mobile phase to reduce the surface tension of water.
The pH of the mobile phase can have an important role on the retention of an analyte and can change the selectivity of certain analytes.
For the preparation of the calibration standard solutions,2.0 mg of mephedrone was added to a 100 mL volumetric flask and dissolved in mobile phase to give a 20 µg/ mL solution.
In elution-extrusion mode(EECCC), The mobile phase is extruded after a certain point by switching the phase being pumped into the system whilst maintaining rotation.
A volatile organic acid such as acetic acid, or most commonly formic acid,is often added to the mobile phase if mass spectrometry is used to analyze the column effluent.
Aside from mobile phase surface tension(organizational strength in eluent structure), other mobile phase modifiers can affect analyte retention.
Hydrophobic molecules can be eluted from the column by decreasing the polarity of the mobile phase using an organic(non-polar) solvent, which reduces hydrophobic interactions.
Principle: The liquid chromatography uses a manifold repeated process of substance distribution between the liquid mobile andsolid stationary phase, during which the substance migrates in various speeds in the flow of mobile phase.
In the descending mode,droplets of the denser mobile phase and sample are allowed to fall through the columns of the lighter stationary phase using only gravity.
Principle: The liquid chromatography uses a manifold repeated process of substance distribution between the liquid mobile andsolid stationary phase, during which the substance migrates in various speeds in the flow of mobile phase. Passing through the chromatographic environment they separate.
As there is a wide variety of stationary and mobile phases available to the analyst, all methods must be properly validated and/or verified prior to routine use.
In 2005 Cummins launched simultaneously meet the Euro 4 emission standard vehicle engines andEuropean non- road mobile Phase III environmental standards to European, American and Chinese markets engineering machinery engine.
As a result, hydrophobic molecules in the polar mobile phase tend to adsorb to the hydrophobic stationary phase, and hydrophilic molecules in the mobile phase will pass through the column and are eluted first.
It is inexpensive, rapid, sensitive andflexible in the selection of both the stationary and mobile phase and amenable to a wide variety of substances, in base and salt form, ranging from the most polar to non polar materials.
An investigator can increase retention times by adding more water to the mobile phase; thereby making the affinity of the hydrophobic analyte for the hydrophobic stationary phase stronger relative to the now more hydrophilic mobile phase.
Standard column chromatography consists of a solid stationary phase and a liquid mobile phase, while gas chromatography(GC) uses a solid or liquid stationary phase on a solid support and a gaseous mobile phase.
Manufacturers should adopt life-cycle thinking and apply it at the design phase of mobile phones; this has arguably the greatest contribution to make to reducing environmental impacts during the lifetime of the phones.
Phase A: pre-identification operations(mobile court operations) 25 September 2007 to mid-May 2008.
The architect for this initial building phase was Thomas Simmons James, a Mobile architect originally from Virginia.
To use Asan İmza(Mobile ID) services, the mobile phone must have GSM Phase 2+ support.
The material recovery and recycling phase of end-of-life mobile phones should be taken into account by manufacturers during product design, by considering the issues of increased recyclability and reduction in toxicity see the guideline of project group 4.1 for greater detail.
At its June 2009 session, AC.3 decided to focus the work on the development of the test cycle and the test procedures, andto keep the development test procedures for Off-Cycle Emission(OCE) and Mobile Air Conditioning(MAC) in Phase 1.
At its June 2009 session, AC.3 agreed to focus the work on the development of the test cycle and the test procedures andto keep the development of test procedures for Off-Cycle Emissions(OCE) and mobile air conditioning(MAC) in Phase 1.
By contrast, in liquid-liquid chromatography, both the mobile and stationary phases are liquid.