[Determination of five biogenic amines in source water by ion chromatography].

An ion chromatographic (IC) method was developed for the separation of five biogenic amines (BAs), including putrescine, cadaverine, histamine, spermidine and spermine, in source water. The sample was separated on a TSK-GEL SuperIC cation exchange column (150 mm x 4.6 mm) after filtering treatment by 0.

[Study on compatibility of Coptidis-Evodia couples by FTIR spectroscopy].

Combining unique macro-fingerprint characteristics of infrared spectroscopy (IR) with the overall concept of traditional Chinese medicine (TCM) theory, the authors seek to establish a new, rapid and economic method for research on Chinese herb preparation (CHP), which could reflect the whole and integration concept of TCM theory and also be widely applied in TCM research. In the present paper, four coptidis-evodia couples, e.g.

[Study on the flavonoids compounds of Thesium chinese].

Objective: To study the flavonoids compounds from the effective fraction of Thesium chinese in anti-inflammation.

Methods: The isolation and purification were carried out by many kinds of column chromatographic techniques. The flavonoids were analyzed by HPLC-DAD, and elucidated by 1H-NMR, 13C-NMR and ESI-MS.

[Study on traditional Chinese medicine extracts of rhizoma coptidis by FTIR spectroscopy].

In the present paper, we applied Fourier transform infrared spectroscopy (FTIR) and second derivative infrared spectroscopy to establish a rapid and efficient analytical method for a preliminary quality control of medicinal herb extracts. The commonly used Chinese herb medicine, Rhizoma coptidis, was taken as an example. The main component-berberine in rhizoma coptidis was analyzed as target compound.

Lead and cadmium in leaves of deciduous trees in Beijing, China: development of a metal accumulation index (MAI).

Lead and cadmium uptake was investigated for common deciduous street trees in Beijing in this study. Species having Cd accumulation included Populus tomentosa, Sophora japonica and Catalpa speciosa. P.