The two total phenols methods are the following: (i) spectral analysis at 280 nm; (ii) colorimetry with Folin-Ciocalteau (FC) reagent. See the attached file (total phenols methods).
The spectral analysis is a practical method and it is usually used in the factories for the quality control. The colorimetry (FC) is usually used in the scientific papers.
I am interesting in quantitative relationships between the results of the two methods, specifically for grape (e.g. juice), but also in other food/feed.
You could just do a regression of one set of data on the other eg spec=f(color). BUT there is a problem. you have a variable measured with error on both sides of the equation. You probably need to take that into account. One way is discussed in the attached paper. Be sure to plot your data before you do anything else to get an idea of the appropriate regression function, f. Best wishes.
Thanks.
I was interested in data or results from scientific papers or practical reports (e.g. from industry).
- Badges
- Science topic
- Similar topics
- Medicine
- Disease
- Infectious Diseases