The phrase "a fresh sample of" is correct and usable in written English.
It can be used when referring to a new or recently collected specimen or example of something, often in scientific or analytical contexts.
Example: "We need to collect a fresh sample of the soil to ensure accurate testing results."
Alternatives: "a new specimen of" or "a recent example of".
The Nyquist plots for a fresh sample of Co-BDCN-24h, measured after 1 and 50 cycles, are shown in Fig. 7.
On the day of sacrifice, a fresh sample of each colon (50 mg) was collected for myeloperoxidase (MPO) assay according to Krawisz et al., [27].
They also asked all patients to provide a fresh sample of midstream urine.
For the investigation of irreversible reactions, it is essential that each measurement is performed on a fresh sample of identical concentration.
The regioselectivity of the reaction of GFP S147Sulf, T230Dha, 233Δ) 9 with azide was ascertained by incubation of a fresh sample of GFP(T230Dha, 233Δ) 7 with sodium azide (>1000 eq., 37 °C, 4 h).
Immunohistochemical examination was performed on the fixed lymphoreticular tissue [ 34] and the obex; a fresh sample of the caudal medulla was additionally examined by WB (VLA Hybrid technique, see above).
The biomass of understory vegetation and litter was calculated by multiplying the mass of a fresh sample measured in the field by the ratio of sub-sample dry mass to sub-sample fresh mass.
The MammaPrint assay, which is a clinical application of the van't Veer 70-gene breast cancer expression profile, relies on a single fresh sample of tumour to predict prognosis (van 't Veer et al, 2002; Cardoso et al, 2008).
Specifically, Khan (1985) presumably used a part of the test run (with a fresh sample) up to the temperature of 350 °C, and its extrapolation to higher temperatures as a baseline.
The line indicates the ID-VG of a fresh sample.
The line indicates the threshold voltage of a fresh sample.
