This concept seems simple today, but traditional nitrogen evaporators haven’t been overhauled for many years. Even in our lab we were not able to store evaporation methods… until now!
Read More
One of the hottest, yet most neglected topics in sample preparation is evaporation. Most chromatographic methods require some form of sample cleanup prior to injection into a HPLC or GC system to prevent clogging or undesired interferences. Many users opt to skip evaporation and perform a direct injection of the purified sample, but this is not always feasible.
Read More
Choosing the SLE correct elution solvent based on analyte properties produces the cleanest extracts with the highest recoveries.
Read More
Correct pretreatment of samples prior to supported liquid extraction (SLE) produces better partitioning and cleaner extracts. Supported liquid extraction (SLE) is a simple clean-up technique similar to liquid-liquid extraction (LLE), but on a solid supported surface.
Read More
Underloading your SLE+ samples can result in better partitioning and cleaner samples. Supported liquid extraction (SLE) is a simple clean-up technique similar to liquid-liquid extraction (LLE), but on a solid supported surface.
Read More
Developing a new sample prep method should be systematic to ensure ruggedness, and can be done quickly with the right tools. The days of using a vacuum manifold are gone, along with the variability and long extraction times incurred. Today’s options provide an array of positive pressure systems that process a wide range of sample matrices, varying in viscosities.
Read More
So you’ve decided that you need to develop some new methods and one of the biggest challenges is the cost of developing and validating new methods. So, what to do to speed up the process?
Read More
Many Labs today are faced with the challenge of having to do more with existing personnel and space. When looking at developing or modifying a LC/MS or GC/MS assay, one of the most important steps is the sample prep.
Read More
Microelution SPE is a great alternative to conventional SPE methods, enabling the use of lower wash and elution volumes, while maintaining sufficient load volumes, providing concentrated samples, perfect for highly sensitive analysis. Achieving the best, most consistent results means using the right processing conditions, and because all microelution SPE plates are not the same, you might need to adjust your processing conditions when using these plates.
Read More
A new method has been developed for the combined analysis of Vitamin A, Vitamin D, Vitamin E and Vitamin K from serum using LC-MS/MS. The method uses supported liquid extraction (SLE) with a novel sample load which could also potentially be employed for many other highly non-polar analytes that have limited water solubility and are highly protein bound within the body.
Read More
