Is the dry plant extracts maintain their effectiveness when they stayed for a long time? And what the maximum period of survival to its effectiveness?
https://www.sciencedirect.com/science/article/pii/B978012816685700001X
This variable according to the type of plant and its part, each one has its expiry time
I think its relay on the teqninqu of extraction , and the dry extraction definitly maintian the effectivness ,as many reasearcher advised ,So...If you want to store your extract for longer period of time, you must dried it in the form of powder. Powder material may stored in refrigerator for more then one or two year.
I think plant extracts extracted with organic solvents, not affected by long-term storage under the freezing condition, especially (-18oC)
Hi dr .
It does depend a lot on the active compounds, but it also depends on the solvent. The best is to have your analysis as soon as you are able to especially if you are considering antioxidants tests. Storing it at 4oC does not always maintain the activity.
If there are also essential oil compounds it would be best to store it at -20oC, at least. For example, matricine concentration is maintained for over 6 months at -20oC, whereas at 4-8oC it can be diminished to half or even less of the initial value. So you have to consider the stability of the chemical compound in order to have a good activity.
According to the type of plant and which part that extracted from it.
Hi
I agree with the others, it does depend a lot on the active compounds, but it also depends on the solvent. The best is to have your analysis as soon as you are able to especially if you are considering antioxidants tests. Storing it at 4oC does not always maintain the activity.
If there are also essential oil compounds it would be best to store it at -20oC, at least. For example, matricine concentration is maintained for over 6 months at -20oC, whereas at 4-8oC it can be diminished to half or even less of the initial value. So you have to consider the stability of the chemical compound in order to have a good activity.
It depends on the sample type. it varies from sample to sample. the storage of extract for longer period of time, should be dried it in the form of powder. Powder material may stored in refrigerator 4°C for more than one or two year.
It depends on the type of solvent used in preparing the extract and the nature of the active compounds to be investigated in the plant part
This depends on the type of plant, the method of extraction, as well as the storage conditions
Thesis تأثير بعض المستخلصات النباتية وطريقة الخزن في الصفات الخزنية...
هit is depending on many factors such as the storage conditions
According to the type of plant and which part that extracted from it
its depending on factors like storage condition or which part of plant do you want to extract from it , and plant component .
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