the ultrasound assisted emulsification microextraction (usaeme) method followed byinductively coupled plasma-atomic emission spectrometry (icp-aes) was used for preconcentration anddetermination of bismuth (bi), indium (in) and lead (pb) in the plant azolla filiculoides lam. calix [4] pyrrole was used as a chelating agent and tetrachloroethylene was selected as extraction solvent. the main para...

the ultrasound assisted emulsification microextraction (usaeme) method followed byinductively coupled plasma-atomic emission spectrometry (icp-aes) was used for preconcentration anddetermination of bismuth (bi), indium (in) and lead (pb) in the plant azolla filiculoides lam. calix [4] pyrrole was used as a chelating agent and tetrachloroethylene was selected as extraction solvent. the main para...

pb and cd in water samples were determined by cloud point extraction (cpe) with sodiumdiethyldithiocarbamate (ddtc) as the chelating agent and octylphenoxypolyethanl (triton x-114) asthe surfactant prior to flame atomic absorption spectrometry (faas) determination. the main factorsof affecting the extraction and detection processes were optimized. the preconcentration of 10 ml ofstandard soluti...

An aqueous solution of tapioca starch was successfully used as a chelating agent in the sol-gel synthesis Co0.7Me0.3Fe2O4, where Me denotes Co, Mn, Cu, Ni, or Zn. The hysteresis loops all sintered ferrites revealed ferrimagnetic properties. saturation magnetization reduced Co0.7Cu0.3Fe2O4 and Co0.7Ni0.3Fe2O4 because ion substitutions with smaller magnetic moments. Interestingly, exhibited highe...

A nontoxic cellulose solvent and process for forming and utilizing the same. The solvent includes a metal chelating agent, a metal compound, an oxygen scaveng ing stabilizing agent and a caustic swelling agent with the disclosed solvent being prepared in either aqueous or solid form. The solvent is caused to contact cellulosic materials in order to dissolve cellulose therefrom. The dissolved ce...

Plant nutrition studies frequently require nearly complete elimination of trace metals from the nutrient media in which the plants are to be grown. Conventional methods of purification by recrystallization and precipitation have been used for this purpose in some studies. These have proved more difficult and less effective than the adsorption technique developed by STEINBERG (11) and improved b...

A 29-year-old gardener developed acute renal failure following the ingestion of 'Mersil', a combination of mercurous and mercuric chloride, achieving a plasma mercury concentration of 22,000 nmol/litre (400 micrograms/litre). Haemodialysis and charcoal haemoperfusion were ineffective in removing mercury despite prior treatment with the chelating agent dimercaprol. The acute renal failure resolv...

(89)Zr-based imaging agents hold great promise as novel radio-tracers in nuclear medicine. However, insufficient stability of currently used radiometal complexes in vivo is a safety concern for clinical applications. We herein report the first octadentate bifunctional chelating agent for the development of (89)Zr-labelled (bio)conjugates with improved stability.