Sample Preparation

Derek Wachtel, scientist in the DMPK department at Ironwood Pharmaceuticals, and Mingliang Bao, PhD, senior scientist at Labstat International ULC, talk to contributing editor Tanuja Koppal, PhD, regarding various issues they face with sample prep in their laboratories. They both stress that sample prep is very important and a necessary step in any analysis and with newer technologies making it easier and faster to accomplish, there should be no reason to ignore or overlook it.

Thermo Fisher Scientific has developed a high-performance anion-exchange chromatography with pulsed amperometric detection method, based on AOAC Official Method 2011.18, to determine free and bound myo-inositol in infant formula and adult nutritionals.

Routine pipetting tasks across a larger number of samples can often be inefficient, complex, time consuming, and expensive. These hurdles can lead to increased training requirements, preparation time, procedural errors and ultimately hold back the pace of your experiments.

Mechanical sample lysis is rapidly becoming the preferred sample preparation method in life science labs for the isolation of DNA, RNA, proteins, metabolites and other small molecules because the elimination of chemicals, enzymes, and detergents minimizes the introduction of potential inhibitors to downstream processes. The FastPrep-24 5G™ (Fig. 1) is the newest innovation in beat-beaters and produces the fastest lysis of even the most difficult samples.

Thermo Fisher Scientific has developed a rapid and reliable sample preparation procedure and ion chromatography-based method to determine the phytate hydrolysis products in dried distillers grains with
solubles (DDGS).

Problem: With unrelenting need for accurate sample analysis at lower and lower detection limits, there is pressure on modern laboratories for sample prep instruments that can provide automated, accurate reagent additions to previously prepared liquid samples or for preparing several aliquots of these samples with multiple dilution factors. The catch-all phrase that identifies these devices is “liquid handling systems” and they perform absolutely essential tasks that have a direct and large effect on the ultimate measurement accuracy of both inorganic and organic sample analysis.








