All posts by Pickering Laboratories

AHPA User Meeting

AHPHThe 35th annual Natural Products Expo West, the world's largest natural, organic and healthy products event, took place March 4 – 8 at the Anaheim Convention Center in California. The American Herbal Products Association (AHPA), the national trade association that is focused primarily on herbs and botanicals and herbal products, held its annual member meeting and the various committees meeting during this event. This year's meeting featured a keynote speech by Josephine P. Briggs, M.D., Director of the National Center for Complementary and Integrative Health (NCCIH) at the National Institutes of Health (NIH). Her speech focused on research in the diverse medical and health care systems, practices and products that are not generally considered part of conventional medicine. The committee meetings discussed issues that are impacting herbal products industry

Chromatography Quiz #19

Chromatography Quiz #18 Results

We would like to congratulate our grand prize winners of our last newsletter’s puzzle quiz: Helene Lachance from Shur-Gain Nutreco, Tom Schneider from Suffolk County Water Authority, Narjes Ghafoori from LA County Environmental Toxicology Lab, and Joy Gottlieb from New Mexico Department of Health Scientific Lab Division!

q19-1They have each won and will shortly be receiving:
a Polaroid Cube Action Flash Memory Digital Camcorder
(POLC3X) with HD-1080p from Target.com!!

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

The correct answer (click to enlarge):

q19-2

Thank you!
Pickering Labs

Chromatography Quiz #19: Glyphosate Analysis High Pressure Troubleshooting!

Answer the three high pressure questions correctly and win a prize! Simply email your answer as well as your full contact information to Rebecca at rlsmith@pickeringlabs.com by May 15th, 2015 in order to win. You will receive email confirmation that your submission has been received. The answer to the puzzle 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

HPLC running with Pinnacle PCX dual-pump system. Assume normal operating conditions (with respect to flow rates, temperatures, etc.).

Glyphosate Analysis normal pressures

Column Pressure Reagent 1 Pressure Reagent 2 Pressure
90 bar 230 psi 130 psi

After a month of analysis your pressures have changed. What is the most likely cause of the problem in each of the three scenarios below?

Scenario One:

Column Pressure Reagent 1 Pressure Reagent 2 Pressure
100 bar 430 psi 330 psi
  1. Pre-column GARD blocked
  2. Heated Reactor obstructed
  3. Ambient Reactor obstructed

Scenario Two:

Column Pressure Reagent 1 Pressure Reagent 2 Pressure
100 bar 430 psi 430 psi
  1.  Pre-column GARD blocked
  2. Heated Reactor obstructed
  3. Ambient Reactor obstructed

Scenario Three:

Column Pressure Reagent 1 Pressure Reagent 2 Pressure
180 bar 230 psi 130 psi
  1. Pre-column GARD blocked
  2. Heated Reactor obstructed
  3. Ambient Reactor obstructed