2021.2 Food & Beverage
Pesticides in Oranges: Exploring QuEChERS for Peel, Pulp, and Whole Fruit
When poor recoveries are observed for the analysis of pesticides in oranges, it may be due in part to the disparate nature of the sample components (peel and pulp). This article discusses differences that were observed when analyzing peel and pulp separately as compared to the whole fruit.
Do I Really Need to Prepare My Pesticide Standard Solutions Daily?
Reference standard manufacturers carefully formulate their products and conduct stability studies to determine the expiration date you see on the label, but what happens once you mix standards into a stock solution? This study explores what occurs after preparing a 200+ pesticide mix for GC analysis.
Properly Storing Reference Standards Is Key to Accurate Results
Correctly storing reference standards helps ensure compound stability and the integrity of your results. In this video tech tip, we discuss how to safely store your reference standards at varying temperature ranges and what basic steps you need to take before preparing them.
How Long Are Pesticide Standards Good After the Ampul Is Opened?
It’s not uncommon for analysts to ask, "how long are reference standards stable after opening the ampul when stored and handled properly?" We designed an open ampul stability study using the pesticides in our LC and GC multiresidue kits to answer this question. Here’s what we found...