the latest news on DMAA .
DMAA: Only found in select geranium, says new USPLabs-funded study.
Controversial ingredient DMAA has been detected in geranium from select regions of China, but not all, according to a new study from the University of Memphis and funded by USPLabs.
The study, published in Analytical Chemistry Insights , claims to explain why DMAA has been reportedly found in certain samples from China, and not in geranium samples from other regions such as India, Mississippi, France, Egypt and New Zealand.
“Until now, none of the samples analyzed have been identical or reported as from the same region,” wrote the researchers, led by Paul Simone.
“Thus, regional environmental variations could explain the presence of 1,3-DMAA in the Changzhou S11, Changzhou March 2012, and Changzhou May 2012 samples and the absence of 1,3-DMAA concentrations in Kunming and Guiyang geranium samples reported here, [and samples reported elsewhere].”
USPLabs funded a study by Intertek AAC Labs published in August that also reported the detection of DMAA has been detected in Chinese geranium. That study was also published in Analytical Chemistry Insights .
New analysis
According to the paper, the discrepancies in the literature may be due to regional and environmental considerations, argue the Memphis-based researchers.
Simone and his co-workers combined an extraction method with high performance liquid chromatography and tandem mass spectrometry to determine 1,3-DMAA and 1,4-dimethylamylamine (1,4-DMAA) in geranium plant samples from the Changzhou, Kunming, and Guiyang regions of China during both winter and summer.
The researchers reported that 1,3-DMAA and 1,4-DMAA was present in concentrations in the Changzhou geranium plants of China above the reported method detection limit (MDLs).
“The reported concentrations of 1,3-DMAA ranged from 68 to 496 ng/g and 1,4-DMAA ranged from 13 to 162 ng/g,” they said. “Similarly, 1,3-DMAA and 1,4-DMAA were not detected above the MDL in samples from Guiyang and Kunming regions.
“To the best of the authors’ knowledge, this is the first reported inter-laboratory analysis confirming the presence of 1,3-DMAA in a geranium plant (specifically Changzhou S11 sample).”
Multiple labs
Commenting on the discrepancies with results from other leading laboratories, the researchers suggests that a possible solution would be a “multiple laboratory and blind analysis of identical samples expected to have 1,3-DMAA (such as Changzhou region samples) as well as samples that are not expected to contain 1,3-DMAA.
“Using this approach, a satisfactory answer for the national regulatory agencies as well as the commercial interests could be provided.”