Category Archives: glyphosate

2013 Pickering Laboratories North American Catalog

Our latest Catalog for North America is now available!

Click on the link to download the latest product Catalog from Pickering Laboratories, Inc.

Pickering Catalog:

Inside our catalog you will find a complete product listing for all instruments and consumables we currently have available. From Sample Cleanup to Post-Column Derivatization, to artificial Perspiration and Saliva, we hope you find something you will find useful!

Pickering Laboratories in 2013

By Wendy Rasmussen

In recent years, we have released several new products and applications, and with still more on the horizon, it occurred to me that now would be a great time to summarize the Pickering of today – our mindset and our wide variety of products & applications.

Acai Berries
Acai Berries

No longer are we simply the “Post-Column Company”. We are the “Automated-Sample Antioxidants” company.  Think of us as the new “super fruit.” The Acai berry, or perhaps the new Chia Seeds (incidentally, we do have a post-column application for the identification & quantitation of  Antioxidants in a variety of matrices).

We are still very active, and we as a company plan to be here for many years to come. We are still the company founded on chemistry and a desire to to teach, to spread our technical expertise, to support our customers.

It’s been a few years now since Pickering began distributing and supporting our LCTech Product line.  The products have shown an ever increasing interest here in the US and in Canada (our official Sales Territory for this product line). We are very proud to offer these products and we hope we can develop it further in the future.

Historically, we have provided the back-end of an analysis (post-column derivatization). Nowadays, we can provide the front-end of analysis as well (the sample-cleanup).

In thinking about our product offerings, I realized that a simple list does not effectively show the scope of the products we have to offer in 2013 – primarily because we have a lot of overlap between products and product lines.  We’re not a vertical company in that regard.  I suppose one could say our product offerings are more circular in that many do not fall into a single distinct category.  I am a very visual person, and for me, a Venn diagram and our overall “product scale” really helped to understand and clarify our products:

Venn Diagram of Pickering Laboratories
Venn Diagram of Pickering Laboratories
General "Product Scale" for Pickering Offerings
General “Product Scale” for Pickering Offerings
For those of who like lists, you can find one Here, on Pickering’s website, and on LCTech’s Website

For any Questions, please feel free to contact us:

Pickering Laboratories, Inc.
Mountain View, California
Phone: (direct) 650-694-6700 or (toll-free) 800-654-3330


Image of Acai Berries:

Pickering Exhibits at Pittcon 2013

This year’s Pittcon was held in Philadelphia, Pennsylvania from March 17-21, 2013.

view of philly from the museum On display were Pinnacle PCX, EluVAC, and a video of the FREESTYLE Automated Sample Preparation Instrument.  The video was a new technique for us, and it was well received.

The video in our booth was a combination of the separate videos for each module of the FREESTYLE Automated Sample Preparation Instrument. You can view the originals here (they are very informative, and we highly recommend them): FREESTYLE VIDEOS

Wendy, Mike and David enjoyed visiting with existing and future customers, as well as our distributors from around the world, including our Canadian distributor, Chromatographic Specialties.

Before the show opened, we had the opportunity to explore the city.  Philadelphia is one of our oldest cities and is full of history and landmarks. Some of this editor’s favorites include Independence Hall and the surrounding neighborhoods, and the Art Museum (see more below).  On this trip, we explored Reading Terminal Market, and sampled that famous cuisine, the Philly Cheese steak Sandwich. I’m told it is not truly a Philly Steak sandwich unless you have it with Cheez Whiz. Any type of real cheese doesn’t count. I made that mistake on my first trip to Philadelphia, and the man behind the counter let me know it!  I wasn’t about to make that mistake again:

philly cheesesteak

The Philadelphia Museum of Art is known for its amazing collection of artwork (viewed on a previous visit), but is also made famous by the scene of Sylvester Stallone running up the stairs in the movie Rocky.  Since the author of this entry happened to be training for a race, she decided that a little cold wasn’t going to stop her. So she put on her iPod (Rocky Theme playing, of course), and ran from the hotel to the top of the steps and back (total distance: about 2.8miles).

view from the bottom

wendy philly top of steps

wendy rockyOn the return to the hotel, I came across a version of the LOVE sculpture, by American Artist Robert Indiana. I always thought it was was much bigger…

love sculpture


For those of you interested in learning more about the sculpture, click HERE

If you’re ever in Philadelphia, the Philadelphia Museum of Art is definitely worth a visit.

But if you can’t make the trip to Philadelphia, you could also stay home and watch Rocky…

Pickering Attends 4th Annual Latin American Pesticide Residue Workshop

By David Mazawa

The Fourth Latin American Pesticide Residue Workshop (LAPRW) was held from May 26 to 29, 2013 at the Compensar Convention Center in Bogotá, Colombia. About 400 people from universities, private companies, and government agencies responsible for monitoring and regulating pesticide residues in agricultural and environmental samples attended the valuable presentations, discussions, and workshops.Photo May 26, 17 53 47 About 19 different exhibitors, including Pickering Laboratories, proudly sponsored the 4th LAPRW. We would like to thank the Universidad Nacional de Colombia, Sociedad Colombiana de Ciencias Químicas and the Scientific Committee of the Latin American Pesticide Residue Workshop for putting together a great show. We look forward to the advancements of the Fifth Latin American Pesticide Photo May 25, 15 54 43Residue Workshop in Santiago, Chile. Photo May 25, 16 03 43 Photo May 25, 16 54 34 Photo May 25, 17 02 48

David and Laszlo

Glyphosate Use is Increasing

-By Laszlo  Torma

Glyphosate is a commonly used Herbicide worldwide. Here in the United States, it is more commonly known by it’s trade name, RoundUp*.

The South American Crop Protection Monthly Report (August, 2012) predicts strong demand of glyphosate use during the current growing season in Brazil and other South American countries. The combination of aggressive planting of GM soybeans and the increase in planting area of soybean will stimulate the demand for glyphosate use. Brazil is one of the biggest agriculture producers in the world and is also a GM crop production country. In Brazil almost 80% of soybeans are GM soybeans. Roundup Ready soybeans can not only reduce the production cost, but also increase the soybean yield.

What does this mean to the South American analytical laboratories? As the glyphosate use increases, analysis for glyphosate and AMPA likely will increase. Pickering Laboratories analytical method for glyphosate and AMPA in crops is sensitive for low levels of detection and rugged. Sample preparation and cleanup with the cation –exchange column is simplified and the reliable ion exchange post column derivatization analytical protocol can be utilized for overnight runs for increased laboratory production.

For complete method details please visit our website at, or click on the link below to download the application note:

MA207_Glyphosate in soy beans

Pickering Laboratories, Inc.
1280 Space Park Way
Mountain  View, CA 94035

Toll-Free: 800-654-3330
Direct: 650-964-6700

*RoundUp is a trademark of the Monsanto company,




Chromatography Quiz No. 11

Chromatography Quiz #10 Results

We would like to congratulate the grand prize winners of our last newsletter’s Amino Acids Analysis (hardware problem) Chromatography Quiz: Hélène Lachance from Shur-Gain Nutreco in Canada, and Narjes Ghafoori from the LA County Environmental Toxicology Laboratory!!!

They have each won and will be receiving: a Google/Asus Nexus 7 Tablet!  We would like to thank all of you for your submissions.

The correct answer for the modified Amino Acids chromatogram: There was a bubble trapped in the LC Pump head.  Similar noisy baselines could be caused by any of the following: bad pump seals, bad check valves, scratched or damaged pump pistons, faulty pulse dampener, or problems with connections to the pump.  Post-column systems containing reciprocating pumps can also cause noisy pulsations in the baseline, and the frequency of the sine waves should be evaluated to determine which pump is causing the noise. 

This problem can also be caused by dirty reagents or eluents, however in this case the pulsations would be accompanied by the elevation of the background signal. 

Thank you!
Pickering Labs

Chromatography Quiz #11:

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 by January 31, 2013 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: Glyphosate Test Mixture 1700-0080, 2.5 ug/mL, 10 µL injection 

Pickering Column: 1954150 Cation-exchange Column for Glyphosate Analysis,
4 x 150 mm

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

Column Temperature: 55 °C

Flow rate: 0.4 mL/min

Eluent Gradient:

TIME K200 RG019 %
0 100 0
15 100 0
15.1 0 100
17 0 100
17.1 100 0
27 100 0

Post-column conditions for pesticide analysis:

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


Note: A special thanks to Michael Pickering for the suggestion and for providing the “old school” chromatograms (notice the chart reader font on the retention times)!



Glyphosate Guard column to be replaced by New GARD

In an effort to offer superior products, Pickering Laboratories will replace the Glyphosate Guard column (PN 1953020) with the new GARD column protection system <link to GARD abstract>. The Glyphosate Guard Column (PN 1953020) will no longer be available starting Januray 1, 2013. The new GARD prolongs column life without additional back pressure or band spreading. The GARD is an easily replaceable cartridge, which should be replaced every 3 months or 300 injections. Please contact Technical Support with any questions.
PN 1700-3102    Cation-exchange GARD assembly: includes holder and 2 replaceable GARDs
PN 1700-3101    Replacement cation-exchange GARDs (2/pack)
PN 1700-3100    GARD Holder
David Mazawa
Technical Support Chemist
Pickering Laboratories, Inc.
1280 Space Park Way
Mountain View, CA 94043
Phone: 650-694-6700 ext 710
Fax: 650-968-0749