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There is no "limit" set by the USP, it depends on the molecules and what is reasonable. For example in HPLC, 2000 plates is typically what you would like to shoot for but if its a compound with low sensitivity and you need to see low levels you might inject more compound which would increase sensitivity but also probably affect peak shape and thus theoretical plates. The answer is it depends
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How are the levels of pesticides measured?
Pesticide levels are typically measured using analytical techniques such as gas chromatography or liquid chromatography coupled with mass spectrometry. These techniques can detect and quantify the presence of specific pesticide residues in a sample. Measurements are then compared to safety standards and regulations to determine if levels are within acceptable limits.
How can one identify compounds in gas chromatography?
Compounds in gas chromatography can be identified by comparing their retention times to known standards or using mass spectrometry to analyze their molecular structure.
What factors can affect the adjusted retention time in gas chromatography?
Factors that can affect the adjusted retention time in gas chromatography include the type of stationary phase, the temperature of the column, the flow rate of the carrier gas, and the chemical properties of the analyte being separated.
Why hydrogen is used carrier gas?
Hydrogen is used as a carrier gas in gas chromatography because it has good thermal conductivity, low density, and high diffusivity. This allows for high separation efficiency and faster analysis times. Additionally, hydrogen is inert and compatible with most detectors used in gas chromatography.
Identify and explain the main drawback of gas chromatography in the identification of drugs?
One main drawback of gas chromatography in drug identification is that it requires a relatively high level of expertise to operate and interpret the results accurately. Additionally, not all drugs are amenable to gas chromatography analysis due to their chemical properties and volatility. This can limit the range of drugs that can be effectively identified using this technique.
What is the efficiency of packed columns in gas chromatography?
It is around 4000-6000 plates for a 2 meter column.
What has the author Ernst Bayer written?
Ernst Bayer has written: 'Gas-Chromatographie' -- subject(s): Gas chromatography 'Gas chromatography' -- subject(s): Gas chromatography
How do you calculate RSD in gas chromatography?
hoe RSD calcuate in gas chromatography
What are the different types of chromatography?
there are different types like gas chrom. and thinlayer chrom Answer: There are two types of chromatography:liquid chromatography gas chromatography
What are 3 types of chromatography?
1. thin -layer chromatography 2. gas chromatography 3. liquid chromatography
Is planar chromatography same as gas chromatography?
No, they are different techniques.
What has the author Robert Sydney Lowrie written?
Robert Sydney Lowrie has written: 'Inorganic and physical chemistry' -- subject(s): Inorganic Chemistry, Physical and theoretical Chemistry 'Gas Chromatography'
What has the author Douglas Ambrose written?
Douglas Ambrose has written: 'Gas chromatography' -- subject(s): Gas chromatography
What has the author Austin V Signeur written?
Austin V. Signeur has written: 'Guide to gas chromotography literature' -- subject(s): Bibliography, Gas chromatography 'Guide to gas chromatography literature' -- subject(s): Bibliography, Gas chromatography
How is paper chromatography used in everyday life?
it can be used in everyday life by liquid chromatography, gas chromatography, thin-layer chromatographyand paper chromatography.
Calibration of gas chromatography?
What is the precedure for calibration of gas chromatography? How calibration is perform for gas chromatography? What is the precedure for calibration of gas chromatography? How calibration is perform for gas chromatography?
Is qualitative determination using gas chromatography the best separation technique?
The quantity of a substance separated by gas chromatography can be determined by its?
