Chromatography Quiz #32: I’m not seeing any peaks! Carbamates edition – RESULTS
Pickering Labs would like to congratulate all of our winners for our previous newsletter’s I’m not seeing any peaks! Carbamates edition Quiz: Jim Balk from Nebraska Public Health Environmental Lab, Josiah Hakala from Minnesota Department of Health, Narjes Ghafoori from LA County Environmental Toxicology Lab, Tom Schneider from Suffolk County Water Authority, and Jiufeng Fan from Glaxo Smith Kline.
Winners will soon receive: A Tile Pro Combo from Amazon.com! Tile is a tiny Bluetooth tracker and easy-to-use app that helps you find everyday items in seconds. Sleek, durable and water-resistance, the Tile Pro seamlessly pairs with your smartphone. The easiest way to find your things!
Congratulations to our quiz winners!
Thank you all for your submissions!
The correct answers for the “I’m not seeing any peaks!” Carbamates edition quiz:
The reactor temperature was set too low. In normal operation, the reactor temperature should be set to 100 °C for proper post-column reaction completion. The incomplete reaction will give you low response for all analytes except Carbaryl and 1-Naphthol. Carbaryl becomes 1-Naphthol after the first step in the post-column reaction and 1-Naphthol is naturally fluorescent and does not require the OPA reaction.
Chromatography Quiz 33 – What the Brij?!?
Correctly answer the question below and win a prize! Simply email your answer and your full contact information to Rebecca at rlsmith@pickeringlabs.com by November 1, 2019 in order to win. You will receive email confirmation when your submission is received, and the troubleshooting answer and winner congratulations will be published in the next issue (to be anonymous, please notify Rebecca in submission).
Below you will find the method details for the Fumonisins method. What is the purpose of adding 30% Brij to the post-column derivatizing reagent?
(Full method abstract(s) available on our website.)



The North American Chemical Residue Workshop (NACRW) conducts an annual meeting catered to scientists who are particularly interested in trace level analysis of pesticides, veterinary drug residues and other chemicals in food, animal feed and environmental samples. Formerly named the Florida Pesticide Residue Workshop (FPRW), this year marks the 56th Annual Conference!
Two of our research chemists will be traveling to Naples, Florida from July 21-24, and they hope to get a chance to meet customers face-to-face and compare notes on the latest research and upcoming industry needs! Sareeta Nerkar will be joined by Maria Ofitserova in representing Pickering Laboratories at the meeting. In addition to sponsoring a luncheon, Sareeta and Maria will be hosting a vendor seminar on Wednesday, July 24 that will include the latest post-column applications, including Mycotoxins Analysis in Hemp and additional exciting news.
Philadelphia, Pennsylvania was the site of Pittcon 2019 and Pickering Laboratories was one of over 1,000 exhibitors at the convention center. As Philadelphia is centered between the New York and Washington D.C., the location brought us close to many of our customers and soon-to-be customers particularly in the pharmaceutical industry.
While at Pittcon, we hosted a daily raffle at our booth. Each expo day, we chose a winner for a pair of 




