Table 1 Comparison of extractants on different parameters based on a five point scale [0–4] and with different weights allocated to the different parameters. [A = results for Anthocleista grandiflora and C = results for Combretum erythrophyllum]
From: Avoiding pitfalls in determining antimicrobial activity of plant extracts and publishing the results
weight | Acetone | EtOH | MeOH | MCW | MDC | Water | |||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
parameter | A | C | A | C | A | C | A | C | A | C | A | C | |
quantity extracted | 3 | 6 | 3 | 9 | 6 | 12 | 12 | 12 | 12 | 3 | 3 | 9 | 9 |
rate of extraction | 3 | 12 | 15 | 12 | 12 | 12 | 12 | 12 | 12 | 15 | 15 | 9 | 9 |
number of compounds extracted | 5 | 20 | 20 | 10 | 15 | 15 | 20 | 10 | 15 | 10 | 15 | 5 | 5 |
number of inhibitors extracted | 5 | 20 | 20 | 0 | 10 | 20 | 15 | 20 | 20 | 20 | 15 | 0 | 0 |
toxicity in bioassay | 4 | 16 | 16 | 8 | 8 | 0 | 0 | 8 | 8 | 8 | 8 | 16 | 16 |
ease of removal | 5 | 20 | 20 | 5 | 5 | 10 | 10 | 10 | 10 | 20 | 20 | 0 | 0 |
hazardous to use | 2 | 8 | 8 | 8 | 8 | 2 | 2 | 6 | 6 | 6 | 6 | 8 | 8 |
total | 102 | 102 | 52 | 64 | 71 | 71 | 78 | 83 | 79 | 79 | 47 | 47 | |