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Column chromatography (1)
Time of Update: 2022-01-31
Figure 23-3 Schematic diagram (a) and actual operation diagram (b)The method of using nitrogen pressurized column chromatography is as follows:(1) As shown in Figure 23-3, set up the device.
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Column chromatography (two)
Time of Update: 2022-01-30
Figure 23-4 Schematic diagram (a) and actual operation diagram (b)The use method of double-linked sphere pressurized column chromatography is basically the same as the above-mentioned nitrogen pressurized column chromatography .
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The concept of reversed phase column and normal phase column in liquid chromatography
Time of Update: 2021-09-08
pressure. The longer the column, the better the resolution, but the longer the time . The particle size affects the vortex diffusion phase. The smaller the particle diameter
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Maintenance and maintenance of liquid chromatography column
Time of Update: 2021-09-08
Before using the buffer salt, use the filtered mobile phase to flush 20-30 times the column volume at a flow rate of 1.
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Aging treatment of gas chromatography column
Time of Update: 2021-09-08
and the carrier The combination is often weak, and it will slowly lose when used at high temperatures, causing baseline fluctuations and increased noise . In order to avoid this phenomenon, you can
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Coupled-Column Liquid Chromatography for the Determination of Pesticide Residues
Time of Update: 2021-02-18
This chapter demonstrates the versatility and feasibility of coupled-column reversedphase liquid chromatography (LC/LC) for the rapid, selective, and sensitive determination of pesticides in environmental water samples. The work includes
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on High-Performance Liquid Chromatography and Fluorimetric Detection with Post-column Derivatization
Time of Update: 2021-02-17
The filtered extract is purified by immunoaffinity column and FB 1 and FB 2 are eluted with methanol.
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The capillary column gas chromatography measures benzene in water-based epoxy coatings
Time of Update: 2020-12-29
of the relative correction factor of 2.2.2 toluene was called 0.0206g, 0.0220g, 0.0217g, and the mass of the internal object was 0.0219g, 0.0205g, 0.0217g, and the peak area of benzene was measured.
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Purification of Proteins Using UltraMacro Spin Columns or ProSorb Sample Preparation Cartridges for Amino Acid Analysis
Time of Update: 2020-12-18
Sample contaminants contribute to background noise that hampers amino acid analysis, variably affecting recoveries of individual amino acids ( 1 ).
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Isolation of Natural Products by Low-Pressure Column Chromatography
Time of Update: 2020-12-15
Many of these examples incorporate a combination of adsorption and size-exclusion chromatography to obtain specific compounds.
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Capillary column gas chromatography determines benzene and toluene in water-based epoxy coatings
Time of Update: 2020-11-28
flow: 0.8mL/min). gasification chamber temperature: 1 6 0 degrees C; E L204 electronic balance; K Q-300D E-type CNC ultrasonic cleaner; internal targets: isodol (analytical pure); calibration compounds: benzene, toluene
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Liquid Chromatography Column Technology
Time of Update: 2020-11-24
The last decade has seen tremendous advances made in LC columns and column technology. From the development of the pellicular packings in the late 1960s to the 5- to 10-�m microparticles of the 1970s, the column has not only increased the speed
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Maintenance of liquid chromatography pumps/columns/detectors (UVs).
Time of Update: 2020-11-22
related topics Liquid phase chromatography and gas chromatography technology 1.HPLC daily operating conditions: temperature: 10 to 30 degrees C<; 2. Pump maintenance:
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The liquid chromatography column uses sample processing and the preparation of the flow phase
Time of Update: 2020-11-02
/>c, the viscosity of the flow phase should be as small as possible, in order to use a longer analysis column can get a good separation effect, while reducing the column pressure drop, extending the life of the liquid pump (can be used to improve
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Selection and preparation of thin layer chromatography solvent/developing agent/color developer and matters needing attention
Time of Update: 2020-10-25
, and the polar groups can usually form hydrogen bonds, such as carp acid, hydroxyl. The above substances, the decreased molecular weight of the parent nuclear, the increase of unsaturated health in the maternal nuclear structure (especially
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Selection and preparation of thin layer chromatography solvent/developing agent/color developer and matters needing attention
Time of Update: 2020-10-20
conditions of the expander: (1) have good solubility of the desired ingredients; (2) can separate the ingredients; (2) the RF of the part to be measured is between 0.2 and 0.8, and the quantitative determination is between
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Add the code! Out of the column a subsidy of 10 yuan, the province to prepare for the pig.
Time of Update: 2020-08-06
a good summer and autumn epidemic prevention and control, put the prevention and control measures into practice. 2 allows inter-provincial point-to-point transfer, completes the column task reward each head 10 yuan "notice" also proposed
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Research group of Professor Yang Yingwei of Jilin University: in situ preparation of gold
Time of Update: 2019-07-10
In recent years, Professor Yang Yingwei's research group of Jilin University has carried out a series of innovative work in the design, synthesis and application development of new supramolecular macrocyclic receptors.
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The Application of SepaFlash® Strong Anion Exchange Chromatography Columns in the Purification of Acidic Compounds
Time of Update: 2018-11-09
Separation spectrum of sample on normal phase silica gel column Figure 4.
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The Application of SepaFlash® Strong Cation Exchange Chromatography Columns in the Purification of Alkaline Compounds
Time of Update: 2018-09-13
Imagine another situation: if the target product to be collected is neutral component A, the following purification strategy can be adopted: connect the SCX separation column with another positive phase silica gel column in series (see Figure 5); 3.
