Newly designed liquid chromatographic method using relative molar sensitivity based on 1H-qNMR for quantifying polymethoxyflavones from Kaempferia parviflora
Daigo Iwasaki, Hiroaki Kawamoto, Toshiyuki Murakami, Takashi Ohtsuki, Hiroshi Matsufuji · 2026
Read Newly designed liquid chromatographic method using relative molar sensitivity based on 1H-qNMR for quantifying polymethoxyflavones from Kaempferia parviflora by Daigo Iwasaki, Hiroaki Kawamoto, Toshiyuki Murakami, Takashi Ohtsuki, Hiroshi Matsufuji (2026) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/PMC13320506.txt.
Description
Daigo Iwasaki and co-authors set out a 2026 lab method for checking active plant compounds in black ginger extract, a food ingredient widely used in Japan. Testing six related compounds normally needs six pure reference samples, which are hard to obtain. The new method uses just one reference sample plus a magnetic resonance technique that measures amounts directly.
Fast liquid separation on a special column reached a lowest measurable level of 2.00 units per litre for the set. Checks against a second mass based method confirmed the right compounds were being read. Accuracy and repeat results met AOAC rules for such tests. Fewer reference samples should lower cost and ease quality checks for makers in other places too.
Catalog record
| CREATOR | Daigo Iwasaki, Hiroaki Kawamoto, Toshiyuki Murakami, Takashi Ohtsuki, Hiroshi Matsufuji |
|---|---|
| YEAR | 2026 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 63128 |
| LICENSE | https://creativecommons.org/licenses/by/4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |