A method has been developed for detecting arsenic in animal feed, according to a study published in the Journal of Agricultural and Food Chemistry.
A method has been developed for detecting arsenic in animal feed, according to a study published in the Journal of Agricultural and Food Chemistry.1
By using high performance liquid chromatography coupled to an inductively coupled plasma mass spectrometer (HPLC–ICP-MS), the researchers claim to be able to detect two organic arsenic animal feed additives including roxarsone and p-arsanilic acid, as well as other arsenic species such as arsenite, dimethylarsinic acid, monomethylarsonic acid, arsenate and 4-hydroxyphenylarsonic acid. Using a gradient elution procedure, the separation of the seven arsenic species was reported in less than 20 minutes. Liquid chromatography coupled to tandem mass spectrometry was used as an assistant tool to screen arsenobetain in the feed samples. The method is reported to be capable of detecting less than 1.7 μg of arsenic per kg, with a recovery greater than 78.5% for all arsenic species. According to the report the ion-pair reversed-phase HPLC–ICP-MS method was then successfully applied to the speciation of arsenic in feedstuff and formula feed samples.
1. P. Wang et al., J. Agric. Food Chem., on-line 7 April 2010.
This story originally appeared in The Column. Click here to view that issue.
Paraben Exposure and Childhood Obesity Risk in Preschoolers: UPLC-MS/MS Insights from Recent Study
July 14th 2025Researchers speculating that exposure to paraben in early childhood is associated with changes in satiety hormones performed analysis of urinary methyl, ethyl, propyl, and butylparaben (MeP, EtP, PrP, BuP) levels in 4–6-year-old children, using ultra-performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS).
GC-MS Sheds Light on Chemical Communication Between Desert Locusts
July 9th 2025A multinational research team used behavioral assays and gas chromatography-mass spectrometry (GC-MS) to examine short- and long-term interactions between juvenile and adult desert locusts to test their hypothesis that cross-stage interactions influence juvenile cohesion and physiological traits.