Pickering Laboratories
Menu
 
Menu

Cleanup Columns for Aflatoxin M1

Continuing to build on our LCTech product line for Myctoxin analysis, we are very happy to report that we now have cleanup columns for M1 in milk and dairy products.Milch

Borrowing text from our partners at LCTech:

LCTech has developed the immunoaffinity columns AflaCLEAN™ Select M1 and AflaCLEAN™ SMART M1 for the clean-up for aflatoxin M1 from milk and dairy products in the format of 3 mL or the practical SMART format to simplify the sample preparation for the analysis of food.

Both formats of the columns have a loading capacity of 100 ng aflatoxin M1 and convince with excellent recoveries ≥ 90%.

The immunoaffinity column AflaCLEAN™ Select M1 can be automatically processed with the AcceCLEAN™ or the FREESTYLE™ robotic system. The SMART columns impresses especially in combination with the FREESTYLE™ ThermELUTE™ providing an automated handling from extract to the chromatogram with a sample throughput of more than 500 samples per week and a reduced solvent consumption at the same time.

Also, LCTech have on their website a great resources called Matrix of the Month. Be sure to click over and check it out.

Please don’t hesitate to contact us if you have any questions: support@pickeringlabs.com

Chromatography Quiz #17

Chromatography Quiz #16 Results:

We would like to congratulate our grand prize winners of our last newsletter’s Blast from the Past Picture Quiz: Richard Dickerson from Eurofins Nutritional Analysis Center, della terra gourmet gift setNarjes Ghafoori from LA County Environmental Toxicology Laboratory, Tom Schneider from Suffolk County Water Authority, Dr. Pravish Tiwari from Cipla, Matthew Hartz from Eurofins Eaton Analytical, and Dr. Paul Levy from the Children’s Hospital at Montefiore!

They have each won and will shortly be receiving: a Della Terra Gourmet Gift Set!!  The 25-year-aged balsamic vinegar and signature extra virgin olive oil are presented elegantly in this delightful collection by the Della Terra family, and delivered courtesy of gifttree.com.

We would like to thank all of you for your submissions!

The correct answer for the flashback picture:

Despite Michael’s adamant protests, the photographer insisted on prominently displaying the Trione bottles during the photo shoot for the fluorometer detector.  Seeing as how Trione is not a fluorescent reagent, this choice was almost as embarrassing as the quote “Gilson’s 121 is the best fluorometer I’ve used” boldly stated in the original advertisement.  The year this Gilson ad was published, Michael was approached (good-naturedly) by every other fluorometer manufacturer at Pittcon.

Thank you!

Pickering Labs

Chromatography Quiz #17:

Oct 1, 2014, Editor’s Note: We discovered a typo. Originally, we listed the Reactor 1 temperature at 100°C. It should be 36°C 

Identify the error made when running the Glyphosate chromatogram below and win a prize!  Simply email your answer as well as your full contact information to Rebecca at rlsmith@pickeringlabs.com by November 1st, 2014 in order to win.  You will receive email confirmation that your submission has been received.  The troubleshooting answer and winner congratulations will be published in the next issue (to be anonymous, please notify Rebecca in submission).

Glyphosate Analysis for US EPA Method 547

Pickering Standard: 1700-0080 Glyphosate Test Mixture, 2.5 µg/mL, 10 µL injection

Pickering Column: 1954150 Cation-exchange Column for Glyphosate, 4x150mm

Normal Operating Conditions: (for reference only, condition changes may be reflected in chromatogram)

Column Temperature: 55°C

Flow rate: 0.4 mL/min

Eluant Gradient:

eluant gradient for quiz 17

Post-column conditions:

Reagent 1: Oxidizing reagent – 100 uL of 5% Sodium Hypochlorite in 950 mL of GA116

Reagent 2: 100 mg of OPA, 2 g Thiofluor™ in 950 mL of GA104

Reactor 1: 36 °C, 0.5 mL

Reactor 2: ambient. 0.1 mL

Reagent flow rates: 0.3 mL/min

Detection: Fluorometer ex 330 nm, em 465 nm

Troubleshooting Chromatogram:glyphosate troubleshooting chromatogram quiz 17

Reference Chromatogram:glyphosate reference chromatogram quiz 17

The Origins of Trione

By Mike Gottschalk

Michael Pickering got the idea for Trione on his first day as a research chemist at Durrum Instruments back in 1976. While they were showing him their Amino Acid analysis instrument they opened the refrigerator to reveal the eluents and reagents in their reservoirs. One solution was red. He asked, “What’s the red stuff?” The reply was that it was the ninhydrin reagent. He asked, “Why is it red, ninhydrin isn’t red!” The answer was no one knew. He said, show me the instrument later, take me to documents, “I want to see the formula for the ninhydrin.” Seeing the formula reveal that Stan Moore’s recipe included Dimethylsulfoxide (DMSO) as the essential water miscible organic solvent. While DMSO is a great solvent, it’s also reactive, and responsible for the secondary reactions that lead to the background red color.

Before join Durrum Instruments Michael had followed the work of George Olah in Carbonium ion chemistry. He’s the guy who developed “magic acid” which could protonate methane to make CH5+. His solvent of choice was sulfolane, a water miscible, non-reactive organic solvent.

The idea was born. However, Durrum Instruments had no interest in making consumables. The company where he next worked was Spectra Physics which also had no interest in making consumables. But on his starting interview with personal he was required to list his ideas that he thought were patentable. Number one was Trione.

Early on, he enlisted the help of Bertum Russel, a chemistry patent attorney to get the patent for Trione. Bertum’s conditions were “If you think you’re going to make money by licensing this I won’t waste your money, but if you are going to make it, I’ll get you a patent.”

That same year, Michael contacted Stan Moore at Rockefeller University to get his assessment after using Trione. Afterall, what better way to start a business than to have the endorsement of one of the researchers who developed the original ninhydrin. Stan said, “You should do well with this but I have post-docs making ninhydrin for me every day so I won’t need to buy it.”

Undeterred, Michael gave seminars and workshops thought the analytical community and soon acceptance by the analytical chemists made Trione the best in class ninhydrin for Amino Acid analysis it is today.

Pittcon 2014

This year’s Pittcon was held in Chicago, Illinois from March 3-6.

The overwhelming theme of this meeting was COLD. Winter was still very present in Chicago that week with temperatures dropping well below freezing.chicago 2014

But despite the cold, there was a good turnout and it was a successful show. As usual, we had on hand our Pinnacle PCX and our post-column applications. We also had our FREESTYLE Sample Cleanup system. This is always a great show for meeting distributors, suppliers, customers. Nowadays Pittcon is as much (if not more) about networking and meetings as it is about finding new equipment.

Beer sampler
The sampler at 18th Street Brewery

We usually try to find some adventure or other on the Sunday before the show starts, and this year was no exception. This year, we braved the cold and the snow to venture out to Gary, Indiana!  Before Pittcon, this editor had visited 45 of the 50 US States. Indiana was one of 5 remaining.

Waiting for the train under McCormick Place
Waiting for the train under McCormick Place

The requirements for the day were: 1) easy to get to without a car 2) be located outside the city limits of Chicago and 3) have a restaurant/bar close to the train station.  After some internet research, the 18th Street Brewery in Gary, IN seemed to fit the bill perfectly!

you are beautiful
We were told the Aquatorium is a fun place in summer

We took the South Shore Line from McCormick Place  out to Gary, where we trudged through a foot of snow to the 18th Street Brewery.  It turns out this is a wonderful brewery with good beer and friendly folks. And they even had a grill out back which was cooking up kielbasa sausage with kimchi. If you’re ever in Chicago and need a change of pace, or are in northern Indiana, it’s worth a stop.

All in all it was a good trip and a successful meeting. But I’m glad Pittcon 2015 will be in New Orleans…

Joint Western & Eastern Canada Workshop

Pickering Laboratories participated in the first joint Western & Eastern Canadian Trace Organic Workshop, held in Guelph, Ontario.   We shared a table with our Canadian distributor, Chromatographic Specialties. The meeting was well attended and there were many interesting talks. The purpose of the meeting is to share the latest methods and information about trace analysis — for a wide range of analytes from pesticides, to dioxins, to PCBs, flame retardants, and surfactants.

We presented two posters:

Cleanup and Determination of Aflatoxins in Peanuts and Peanut Butter using Immunoaffinity Cleanup with HPLC- Post-column UVE Photochemical Derivatization

and

Glyphosate analysis in soy beans, corn and sunflower seeds by HPLC with post-column derivatization and fluorescence detection

In addition to the two posters, we had the latest information on the FREESTYLE Sample Preparation system, and in particular the ThermELUTE module, for rapid and sensitive cleanup and analysis of Aflatoxins and Ochratoixn A.

Guaranteed Chemistry