The phrase "a unique sample of" is correct and usable in written English.
It can be used when referring to a specific instance or example that is distinct or one-of-a-kind within a larger context.
Example: "The researchers collected a unique sample of data that had never been analyzed before."
Alternatives: "an exclusive example of" or "a distinctive instance of".
The Netherlands Twin Register identified a unique sample of 100 12-year-old monozygotic twin pairs discordant and 396 boy girl twin pairs concordant for teachers' gender.
The effectiveness of conventional firm-specific incentive tools is assessed based on the perceptions of a unique sample of employees from seven European countries.
Fortunately, we have access to a unique sample of leaders in public service: enrollees in a Harvard University executive education program that attracts mid- to high-level government officials and military officers from America and around the world.
Based on a unique sample of 32 in-depth interviews with Brussels policy elites, this book casts EU interest representation in a new light.
In this paper, we present an original approach for the writer authentication task based on the analysis of a unique sample of a handwriting word.
We report from a large-scale randomized field experiment conducted on a unique sample of more than 15,000 taxpayers in Norway, who were likely to have misreported their foreign income.
To study this, we have applied a unique sample set of freshly frozen primary- and metastatic endometrial carcinoma lesions as primary investigation set for a global and comprehensive characterisation of molecular changes, and an independent, large and extensively annotated patient series for validation of findings.
Here we have studied a unique sample set consisting of samples of HIV-infected drug users prior to diagnosis of pulmonary TB, which allowed identification of biomarkers that predict TB development months before clinical diagnosis of TB.
The magnitudes and the error bars for the total histogram were calculated from of a set of results, each obtained from PACE analysis of a unique "sample"–"control" pair of replicates.
Lalremruata et al. used a unique sample set from some of the most isolated human communities on the planet, but were limited by the number of loci that they could investigate because so few P. malariae and P. brasilianum samples have been studied genetically.
The survey yielded a regionally unique sample of 919 people diagnosed with SMD (DSM-IV diagnoses of schizophrenia or schizoaffective disorder, bipolar disorder or major depressive disorder), of whom approximately 600 remain under follow-up after 12 15 years.
