@article {4552, title = {The separation of dimethylarsinic acid, methylarsonous acid, methylarsonic acid, arsenate and dimethylarsinous acid on the Hamilton PRP-X100 anion-exchange column}, journal = {Applied Organometallic Chemistry}, volume = {13}, number = {11}, year = {1999}, note = {ISI Document Delivery No.: 255DLTimes Cited: 24Cited Reference Count: 29}, month = {Nov}, pages = {837-843}, type = {Article}, abstract = {In order to separate the potential arsenite metabolites methylarsonous acid and dimethylarsinous acid from arsenite, arsenate, methylarsonic acid and dimethylarsinic acid, the pH-dependent retention behaviour of all six arsenic compounds was studied on a Hamilton PRP-X100 anion-exchange column with 30 mM phosphate buffers (pH 5, 6, 7, 8 and 9) containing 20\% (v/v) methanol as mobile phase and employing an inductively coupled plasma atomic emission spectrometer (ICP-AES) as the arsenic-specific detector. Baseline separation of dimethylarsinic acid, methylarsonous acid, methylarsonic acid, arsenate and dimethylarsinous acid was achieved with a 30 mmol dm(-3) phosphate buffer (pH 5)-methanol mixture (80:20, v/v) in 25 min. Arsenite is not baseline-separated from dimethylarsinic acid under these conditions, Copyright (C) 1999 John Wiley \& Sons, Ltd.}, keywords = {ARSENATE, ARSENITE, BEHAVIOR, DIMETHYLARSINIC ACID, dimethylarsinous acid, ENVIRONMENT, ENZYMATIC METHYLATION, GLUTATHIONE, HPLC-ICP-AES, LAKE-BIWA, METABOLISM, METHYLARSENICALS, methylarsonic acid, methylarsonous acid, SPECIATION, SPECTROMETRY}, isbn = {0268-2605}, url = {://000083654200005}, author = {Gailer, J. and Madden, S. and Cullen, W. R. and Denton, M. B.} } @article {4183, title = {The production of methylated organoantimony compounds by Scopulariopsis brevicaulis}, journal = {Applied Organometallic Chemistry}, volume = {12}, number = {12}, year = {1998}, note = {ISI Document Delivery No.: 149RQTimes Cited: 34Cited Reference Count: 37}, month = {Dec}, pages = {827-842}, type = {Article}, abstract = {Cultures of the fungus Scopulariopsis brevicaulis were grown in antimony-rich media. Although volatile compounds of other elements were readily detected in the culture headspace, volatile antimony compounds were formed irreproducibly and at only ultratrace levels. In order to monitor the media for nonvolatile methylantimony compounds, a method of sample preparation was developed, based on solid-phase extraction. This enabled the separation of large quantities of soluble inorganic antimony species from trace amounts of organo-antimony compounds before speciation by HG-GC-AAS, By this methodology methylated antimony compounds were detected at concentrations of 0.8- 7.1 mu g Sbl(-1) in all media in which S. brevicaulis was grown in the presence of antimony(III) compounds. These methylantimony species were not detected in any of the nonliving or medium-only controls. Methylated compounds were not detected where S. brevicaulis was grown in the presence of antimony(V) compounds. This is the first study to show that antimony(III) compounds are biomethylated by S. brevicaulis under aerobic-only growth conditions. (C) 1998 John Wiley \& Sons, Ltd.}, keywords = {ANTIMONY, APIOTRICHUM-HUMICOLA, ATOMIC-ABSORPTION SPECTROMETRY, BIOMETHYLATION, biotransformation, GASES, GENERATION, hydride, HYDRIDE GENERATION, infant death syndrome (SIDS), INFANT-DEATH-SYNDROME, LAKE-BIWA, Scopulariopsis brevicaulis, SOLID-PHASE EXTRACTION, SPECIATION, sudden, volatile antimony, VOLATILE METAL, WASTE DEPOSITS}, isbn = {0268-2605}, url = {://000077619500006}, author = {Andrewes, P. and Cullen, W. R. and Feldmann, J. and Koch, I. and Polishchuk, E. and Reimer, E.} }