The phrase "a single extract" is correct and usable in written English.
It can be used when referring to one specific portion or selection taken from a larger text or source.
Example: "In my research paper, I will analyze a single extract from Shakespeare's 'Hamlet' to illustrate my point."
Alternatives: "one excerpt" or "a solitary passage".
There is also a single extraction-dual separation LC-MS for the analysis of a single extract containing both polar and nonpolar metabolites separately on HILIC and RPLC [ 16].
An accelerated solvent extraction method was optimized to obtain all EDCs in a single extract by atmospheric phase.
Figure 2 DYN-MRM-LC-MS/MS chromatogram showing delta retention time (Del RT,Δt) window for 10 spiked drugs of abuse in a single extract of human hair sample.
Each of these two-column sections was used to test a single extract as follows.
9 However, little is known about the beneficial effect of a single extract of PM.
The use of human cartilage extracts to analyze SLRP degradation allowed study of all four SLRPs in a single extract under identical conditions, and permitted SLRP degradation to be carried out in a physiologically relevant extract of matrix proteins.
The proposed method allows the very effective and enriched recuperation of an acidic analyte into one single extract.
Additional limitations include varied number of audience evaluations (ranging from 20-50% of attendees), and the fact that a single individual extracted all of the objective data.
Following the advent of inductively coupled plasma-based spectrometry (ICP), new soil tests were developed in the 1970s and 1980s to enable the simultaneous measurement of multiple elements from a single soil extract [9 12].
To enable multiple analyses to be conducted on a single snus extract, validated in-house analytical methods were modified by changing the solvent volume, extraction method, or application of internal standard.
We have also demonstrated the ability to perform serological testing and DNA profiling on a single TSD extract without the necessity to consume additional sample.
