Extraction and TLC 1 Preparation of a mixed solvent containing 1 ml methanol, 4 ml hexane and 2 Preparation of extract s

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Extraction And Tlc 1 Preparation Of A Mixed Solvent Containing 1 Ml Methanol 4 Ml Hexane And 2 Preparation Of Extract S 1 (31.31 KiB) Viewed 68 times

Extraction And Tlc 1 Preparation Of A Mixed Solvent Containing 1 Ml Methanol 4 Ml Hexane And 2 Preparation Of Extract S 2 (40.46 KiB) Viewed 68 times

Extraction and TLC 1 Preparation of a mixed solvent containing 1 ml methanol, 4 ml hexane and 2 Preparation of extract samples for TLC by dividing 20 ml of the extract. Dried and found that the weight came out 0.15 grams. I want to know if you want to prepare Solution for making TLC with a concentration of 100 mg/m, solvent A must be added. How many ml of ethanol is put in the evaporation cup containing the drying substance ?

If one herb was extracted with 300 ml of ethanol, it was found that after extraction A total of 9 cycles were performed when collecting all extracted solutions. (including the remainder of the thimble and get a total of 240 m of solution. Ask students to comment on why. Therefore, the total solution volume was less than at the beginning of the extraction, and students think it is possible or not How is it possible for extraction to be close to the volume of the solution collected? start 3 4 If the development of the TLC sheet was made longer, the students thought that the Rf value of the substance would be Has it changed? Why? 5 Most of the substances that bands are visible when UV is 265 nm wavelength. What are the properties of the substance?