Can GPC replace Ethereum

1. If you don't know how to set it, you can save some things and restore it in the first issue.

2.

GPC is gel permeation chromatography, also known as size exclusion chromatography. It is based on the separation mechanism of volume exclusion. It is used to separate substances with relatively small molecular weight through stationary phases with molecular sieves, and can also analyze polymer homologues with different molecular volume and the same chemical quality. P>

extended data

gel is chemically inert, and it has no adsorption, distribution and ion exchange. The polymer solution to be measured is passed through a chromatographic column with different pore sizes. The path for molecules to pass through in the column includes the gap between particles (larger) and the through hole in particles (smaller)

when the polymer solution flows through the chromatographic column (gel particles), larger molecules (larger than the gel pore) are excluded from the pores of particles, passing only through the gap between particles, and the rate is faster. The smaller molecules can enter the small holes in the particles, and the passing rate is much slower; The molecules with medium volume can penetrate into the larger pores, but are blocked by the smaller pores, which is between the above two cases

after a certain length of chromatographic column, the molecules are separated according to the relative molecular weight, the ones with large relative molecular weight are in the front (that is, the leaching time is short), and the ones with small relative molecular weight are in the back (that is, the leaching time is long). The total volume of leached liquid received from the sample entering the column to being leached out is called the leaching volume of the sample. The larger the molecular weight is, the smaller the leaching volume is

reference

Network - gel permeation chromatography

3. You mean the filter head in the mobile phase storage bottle? Of course, you can take it out. How to change the mobile phase without taking it out

however, it should be noted that after taking it out and putting it into the new mobile phase, there will be gas into the pipeline, so after changing the mobile phase, it is necessary to empty it, that is, to discharge the air and bubbles. Liquid phase high-pressure pumps are all equipped with emptying valves.

4. Hello, you can go to the settings of Samsung mobile phone,
find the privacy settings, then click on GPS,
finally turn it on, and you can use it.

5.

bus line: Rail Transit Line 2 → rail transit line 3, the whole journey is about 28.5km

1. Walk about 720 meters from Dakou District to Dakou station

2. Take rail transit line 2, pass 11 stops, and reach Niujiaotuo station

3. Walk about 240 meters, and then transfer to rail transit line 3

4. Take rail transit line 3, pass 12 stops, Get to Jintong Road Station

5, walk about 490 meters to Jinshan commercial center - block a

6. If we can't find the GPC of chloroform system, why don't we just use THF GPC instead of chloroform? Use chloroform to transport it to GPC at low flow rate, and the experiment can be done in a few hours. The column does not need to be replaced, so it can be washed together for 6 hours or for 12 hours if you are not sure. The flow rate of the pump is set at 0.1-0.2ml/min.

7. Influential!

8. GPC test of HDPE: Beijing University of chemical technology or Beijing Research Institute of chemical technology< GPC test of DMF mobile phase: Institute of chemistry, Chinese Academy of Sciences

9. Notebook CPU can also be replaced, go to repair the notebook computer, can be replaced.