β- Extraction Method Of Carotene

The specific steps are as follows:

Begin by collecting 500 grams of fresh carrots and giving them a good wash with clean water. Once they are clean, proceed to drain the carrots and give them a chop into smaller pieces. Now, it's time to dry these chopped carrots in an oven set at a temperature of 40 ℃. Allow them to dry for approximately 2 hours. Once they are completely dried, it is important to crush the carrots thoroughly. Make sure to use a method that ensures the carrots are properly crushed. Lastly, pass the crushed carrots through a screen to obtain the desired texture.

To initiate the process, place the sample into a round bottom flask with a capacity of 500 ml. Next, add 200 ml of petroleum ether to the flask and thoroughly mix the contents. It is essential to set up the extraction reflux apparatus, as illustrated in Figure 6-7 from the textbook. Allow the extraction to take place for a duration of 30 minutes. Afterwards, it is important to filter the extract in order to eliminate any solid substances present.

To concentrate the extracted samples, it is recommended to install a distillation unit. This unit will help in the process of condensing and purifying the samples, resulting in a more concentrated form. Installing the distillation unit is crucial for obtaining accurate and reliable results from the extraction process.

In order to identify a sample, one must collect it in the receiver and observe its color and smell. To perform paper chromatography, a clean filter paper must be selected. During operation, it is important to avoid direct contact with the filter paper in order to prevent contamination. Gloves can be worn to aid in this. When sampling, the spot should not be too large in order to prevent yellowing and drying with a hair dryer should be done at a low temperature. After collecting the sample on the filter paper, it is rolled into a cylindrical shape. Care must be taken during rolling to ensure that both sides of the filter paper do not touch each other to avoid capillary phenomenon. This prevents an uneven front edge of the solvent from affecting the results.