"first sample" is a grammatically correct and usable phrase in written English.
For example, "This is the first sample of our new product line."
When considering a boot camp, first sample the free offerings.
But when the first sample screen-print arrived, D'Oyly was horrified.
Puzzled, I inhaled my first sample – sweet and slightly sickly, like bubble gum.
Last summer, Savage collected what would become the museum's first sample of Manhattan street ants.
"The very first sample of paint I tested," he said, "turned out to be acrylic".
But soon after taking his first sample, a swirl of hydraulic fluid drifted past his porthole.
A friend gave Sal Pennacchio, a Wall Street analyst, his first sample of home-brewed beer.
The researchers found that maternal BPA concentrations were similar between the first sample and birth.
This conceivably could necessitate several scrapings if the first sample was not conclusive after laboratory analysis.
When the first sample came back positive for cocaine, Daum demanded that the second sample be tested.
At 7 30 p.m., Joe takes his first sample test, part of a prep course he began in mid-September.
