ABSTRACT
OBJECTIVE: To investigate the chemical constituents of the lichen plants Parmelia tinctorum and Parmelia nimandairana collected from Meng Mountain in Shandong province. METHODS: Various chromatographic techniques were used to isolate and purify the constituents and their structures were elucidated by means of spectral evidence and physiochemical properties. RESULTS: Four compounds were isolated from Parmelia tinctorum and identified as: lecanoric acid (I), evernic acid (II), ethyl orsellinate (III) and 3,5-dihydroxytoluene (IV). Two compounds were isolated from Parmelia nimandairana and identified as: usnic acid (V) and salazinic acid (VI). CONCLUSION: Compounds V and VI are isolated from Parmelia nimandairana for the first time.
Subject(s)
Benzofurans/isolation & purification , Lactones/isolation & purification , Lichens/chemistry , Salicylates/isolation & purification , Benzofurans/chemistry , China , Chromatography, High Pressure Liquid , Hydroxybenzoates/chemistry , Hydroxybenzoates/isolation & purification , Lactones/chemistry , Lichens/classification , Molecular Structure , Resorcinols/chemistry , Resorcinols/isolation & purification , Salicylates/chemistry , Solvents/chemistryABSTRACT
GFAAS determination of trace amounts of cadmium inserum. Optimum conditions for the determination were studied thoroughly. The linear range and the recovery were 0-5 microg x L(-1) and 97.8%-102.5%, respectivly, with the characteristic mass of 4.38 x 10(-11) g.
