background: saliva is an alternative biological matrix in drug testing. it has several advantages in comparison with other biological fluids such as blood and urine. collection of saliva is simple, noninvasive and can be controlled under direct observation in drug abusers, or opium addicts.   methods: in the present study we report our experience with saliva collection, liquid-liquid extraction...

a gas chromatography mass spectrometry with spike calibration curve method was used to quantify three carbamate pesticides residue in cooked white rice and to estimate the reduction percentage of the cooking process duration. the selected pesticides are three carbamate pesticides including carbaryl and pirimicarb that their mrl is issued by “the institute of standards of iran” and propoxur whic...

the essential oils of peucedanum ruthenicum m. bieb. (umbelliferae) leaves, flowers and fruits were prepared by hydrodistillation and analyzed by gc and gc-ms and the composition of the three essential oils were compared. thirty-three, thirty-seven and thirty-one compounds were identified in leaves, flowers and fruits essential oils representing 89.13%, 88.66% and 76.45% of total oils respectiv...

background & aim: salvia spinosa l. is a perennial shrub and aromatic plant belongs to the family lamiaceae. s. spinosa grows wild in some districts of iran. the aim of this study was to identify of the chemical components of s. spinosa in isfahan climatic conditions. experimental: the aerial parts of the plants were collected from isfahan province in 2014. the essential oil was extracted ...