Plant inspection kit principle and method of use.

Plant inspection kit principle, use method: plant test kit so that the samples of the various groups ionization to generate different load ratio of ions, by accelerating the effect of the electric field, the formation of ion beam, into the mass profiler, the use of electric field and magnetic field to make the opposite speed of the attack dispersion - ions in the ion beam slower speed The deflex after the electric field is large, the speed deflex is small, the ion attack angle velocity vector in the magnetic field is opposite deflex, that is, the slow ions are still deflected large, the speed deflex is small, and when the deflex effect of the two fields compensates for each other, their trajectory intersects at one point.
At the same time, the mass difference can also be throbbed in the magnetic field, so that ions with the same mass-load ratio and different velocity gather at the same point, and ions with different mass-load ratios gather at different points, gather them separately to get a mass spectrometry map, and then confirm their mass."
mass spectrometry can also carry out useful qualitative analysis, but the analysis of cluttered organic compounds can not help, and in the quantitative analysis of organic matter through a series of separation of purification operations, very troublesome.
Chromatography is a useful separation and analysis method for organic compounds, especially suitable for quantitative analysis of organic compounds, but qualitative analysis is more difficult, so the useful combination of the two will supply a qualitative quantitative analysis of cluttered compounds.
mass spectrometry, especially its use with chromatographs and computers, has been widely used in the fields of organic chemistry, biochemistry, drug metabolism, toxicology, environmental protection, petrochemicals, geochemistry, food chemistry, phytochemistry, cosmic chemistry and national defense chemistry.
Multi-ion testing with mass spectrometry can be used for qualitative profiling, for example, in pharmacological biology discussions can be based on the retention time of drugs and their metabolic products on gas chromatography and the corresponding mass debris map, the existence of drugs and metabolic products can also be used for quantitative analysis, with the stability isotope isomers of the compounds tested as an internal marker, in order to achieve more accurate results.
Elisa kits In inororor chemistry and nuclear chemistry, many low-evaporative substances can be measured by mass spectrometry using high-frequency spark sources.
the ionization method requires a pure sample electrode.
if the sample to be tested is powdery, it can be mixed with nickel powder and pressed into electrodes.
this method is particularly valuable for the analysis of high-purity substances in processes such as alloys, mineral deposits, atomic energy and semiconductors, and it is likely that impurities of one billionth of a billionth may be detected.
use the decay of long-lived radioisotopes to confirm the existence of objects is of great archaeological and geographical implication.
For example, the presence of radioactive uranium and lead in its decay products in a radioactive deposit, where the decay rates of uranium 238 and uranium 235 are known, the relative abundance of uranium and lead due to decay can be measured by mass spectrometry.
mass spectrometry analysis has certain requirements for samples.
sample for GC-MS profiling should be an organic solution, the organic matter in the aqueous solution can not be determined, must be extracted and different into an organic solution, or the use of overhead sample technology.
compounds are too polar and decompose easily during heating.
, such as organic acid compounds, can now be esterified, the acid into esters and then GC-MS analysis, by the results of the analysis can speculate on the structure of acids.
if the sample can not vaporize or esterify, it can only be LC-MS analysis.
LC-MS profiling is aqueous solution or methanol solution, LC active phase should not contain non-evaporative salt.
Elisa kit for polar samples, the ESI source is generally used, and for non-polar samples, APCI source is used.
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