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Effect of storage time, temperature and solvent on the stability of sterigmatocystin standard solutions
2008
Versilovskis, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Mikelsone, V., Latvia Univ. of Agriculture, Jelgava (Latvia)
The influence of solvent, storage time and temperature on the stability of the mycotoxin sterigmatocystin (STC) was investigated. STC calibrants (1.0 μg mlE-1) in acetonitrile, methanol and mixture of acetonitrile and methanol (50:50, volume/volume) were stored in dark glass bottles at (– 25), 4 and 25 °C for up to 8 weeks. Samples were analysed by high performance liquid chromatography (HPLC) with ultraviolet (UV) detection. Obtained results indicate that more suitable solvents for storage of STC standard solutions at (–25 °C) are acetonitrile and mixture of acetonitrile and methanol (50:50, v/v), but not longer than for one week; for storage at 4 °C more suitable is mix of acetonitrile and methanol, but not longer than for one week.
اظهر المزيد [+] اقل [-]Elaboration of solid phase extraction method for analysis of sterigmatocystin
2007
Versilovskis, A., Latvia Univ. of Agriculture, Jelgava (Latvia) | Mikelsone, V., Latvia Univ. of Agriculture, Jelgava (Latvia)
Sterigmatocystin is a mycotoxin produced by fungi of many Aspergillus species and it is a biogenic precursor of aflatoxin B1. For analysis of various mycotoxins to clean up sample extracts, mainly solid phase extraction (SPE) is used. An elution of sterigmatocystin from Strata X and Strata C18 SPE columns by different acetonitrile-water and methanole-water solutions were checked in this paper. Acquired results showed a possible suitability of both columns for the analysis of sterigmatocystin.
اظهر المزيد [+] اقل [-]