Brooks Rand Labs authored a method for the analysis of the “Big 4” (arsenic, cadmium, lead, and mercury) in food that was recently published as an AOAC First Action Official Method of Analysis. AOAC Method 2015.01 for Heavy Metals in Food by Inductively Coupled Plasma – Mass Spectroscopy (ICP-MS) is applicable to the analysis of a wide variety of matrix types, such as chocolate, fruit juice, fish, infant formula, and rice. The method was specifically written for detection of low-level concentrations of these contaminants, with reporting limits in the 8 – 10 μg/kg (ppb) range, and it utilizes the robust sample preparation power of microwave digestion along with the sensitivity and specificity of ICP-MS detection. The AOAC Method 2015.01 is now available for download. To submit your food or supplement samples for testing, download our Sample Submission Form.
Spectroscopy published an article last month summarizing Brooks Rand Labs’ 2013 Interlaboratory Comparison Study for the Determination of Arsenic and Arsenic Species in Rice, Kelp, and Apple Juice. The purpose of the study was to provide a reliable means for laboratories to evaluate their competency, to assess the intercomparability of the data generated, and to look for any correlation trends between the results and the analytical procedures used by the participating laboratories.
The arsenic (As) contaminant found in food products can be sourced from both naturally occurring As and anthropogenic As, such as arsenical pesticides. The toxicity of arsenic present in the food is specific to the forms present and is subject to numerous factors, which are not easily predicted. It is, therefore, vitally important to examine the various As species in different food types when evaluating toxicity.
The data from the 2013 study demonstrated that there was generally good agreement between the labs reporting arsenic speciation data for food matrices; however, further method development needs to be carried out in order to achieve a higher level of consistency across multiple laboratories worldwide using different analytical procedures. For further information, download the article or view the original report.
This month Brooks Rand Lab extends a big congratulations to Lydia Greaves for her five years of dedicated service. Lydia was hired into BRL’s Project Management group after having previously worked in the industry for several years, including work as a Project Manager at Applied Speciation and Consulting (now merged with Brooks Rand Labs). Her wealth of trace metals chemistry and project management knowledge continues to be an invaluable resource to our clients. She is an absolute delight to work with and, by way of a public spotlight, we hope she feels our immense gratitude.