Sentence examples for difficult matrix from inspiring English sources

Lupin flour revealed to be a difficult matrix, since large amounts of compounds tend to co-purify with DNA, even adopting well established extraction protocols.

Mustard proved to be a difficult matrix regarding precision.

Blood is a more difficult matrix to work with than urine, and collection of it is an invasive procedure.

This is in accordance with the report of Verdon et al. [ 14], but Becker et al. deemed kidney to be a more difficult matrix [ 31].

Thus, a sample preparation step is needed before LC ESI MS analysis to ensure sensitive and reliable determination of small amounts of product formed in a difficult matrix.

For pear leaves (regarded as a difficult matrix to homogenize) containing bromopropylate, phosalone, and tolylfluanide it was observed that the RSD increased from <8% to 14 18% when the amount of subsample was reduced from 25 g to 12.5 g.

These advances have enhanced the utility of Electrothermal atomic absorption spectrometry (ETAAS) for trace element determination at μg L−1 levels, especially in difficult matrices, giving rise to greater reproducibility, lower economic cost and ease of sample pre-treatment compared to other methods.

A second major challenge of mass balances is the difficulty of detecting and quantifying target analytes in difficult matrixes including raw sewage and, more importantly, municipal sludge.

In the most difficult matrices such as the effluent samples from a waste-water treatment plant, RT-ddPCR is still able to quantify viruses in presence of moderate inhibition, unlike RT-qPCR.

Since then, microwave-assisted extraction has also been successfully applied to preparation of samples for analysis of organic compounds in difficult matrices, for example blood, serum, plasma, urine, saliva, human hair, tablets, and suppositories [ 29– 37].

We report a new method that overcomes these limitations and achieves attomole limits of detection per a single compartment while demonstrating substantial robustness toward buffers, blood plasma, and other difficult matrixes.