𝔖 Bobbio Scriptorium
✦   LIBER   ✦

Analysis of undried pyrethrum flowers

✍ Scribed by M. G. Edwards

Book ID
102428405
Publisher
John Wiley and Sons
Year
1950
Tongue
English
Weight
255 KB
Volume
1
Category
Article
ISSN
0022-5142

No coin nor oath required. For personal study only.

πŸ“œ SIMILAR VOLUMES

The analysis of pyrethrum flowers
The analysis of pyrethrum flowers
✍ Mitchell, W. M. ;Tresadern, F. H. πŸ“‚ Article πŸ“… 1949 πŸ› Wiley (John Wiley & Sons) βš– 577 KB

## Abstract It is shown that in the assay of pyrethrum flowers the customary use of warm solvent (soxhlet) gives erroneously high results for pyrethrin II, especially when the higher‐boiling grades of ligroin are used. Cold extraction gives lower results for pyrethrin II, and largely eliminates the