ABSTRACT
Methiocarb was extracted from surface water samples collected at experimental rice field sites in Louisiana and Texas. The sampling system consisted of a single-stage 90-mm Empore extraction disk unit equipped with a battery-powered vacuum pump. After extraction, the C-18 extraction disks were stored in an inert atmosphere at -10 degrees C and shipped overnight to the laboratory. The disks were extracted with methanol and the extracts analyzed by reversed-phase high-performance liquid chromatography with a methanol/water mobile phase. Methiocarb was detected by ultraviolet absorption at 223 nm and quantified with the use of calibration standards. Recoveries from control surface water samples fortified at 5.0, 10, 50, and 100 ng/mL methiocarb averaged 92 +/- 7%. A method limit of detection for methiocarb in rice field surface water was estimated to be 0.23 ng/mL at 223 nm.
Subject(s)
Methiocarb/analysis , Oryza , Pesticide Residues/analysis , Water , Agriculture/methods , Animals , Chromatography, High Pressure Liquid , Diptera , Fishes , Methiocarb/toxicity , Oncorhynchus mykiss , Pesticide Residues/toxicitySubject(s)
Endometriosis/diagnosis , Hamartoma/diagnosis , Liver Neoplasms/diagnosis , Ovarian Neoplasms/diagnosis , Sonication , Ultrasonography , Adolescent , Adult , Cysts/diagnosis , Female , HumansABSTRACT
A case of reflux of contrast medium into the peritoneal cavity via the vagina, uterus and Fallopian tubes during voiding cystourethrography is presented. This patient had abdominal symptoms which may have been related to intraperitoneal reflux of urine during voiding.
