The phrase "a small trace of" is correct and usable in written English.
It can be used to describe a minimal amount or indication of something, often in contexts related to evidence or presence.
Example: "The scientist found a small trace of contamination in the water sample."
Alternatives: "a slight hint of" or "a minor indication of".
In July 2014, supermarket chain Wegmans received notification from supplier Wawona Packing Co. that its peaches arrived in Australia with a small trace of Listeria monocytogenes.
According to her parents, Rachel Dolezal, the chapter head of the Spokane NAACP, is "biologically" white, with perhaps "a small trace" of American Indian ancestry.
Soon after I arrived in his room, Snowden said, with more than a small trace of mockery, "By the way, that Cincinnatus you just emailed, that's me".
After calcination of the composite nanofibers at temperatures of up to 550 °C, the anatase phase was the major phase in the pure TiO2, and only a small trace of the rutile phase remained.
Of course, a small trace of binary copper sulfide phase is also observed in this sample (such as the tiny peaks at around 29° and 33° should be attributed to CuS phase).
The purple color of the bruise had faded, leaving only a small trace of discoloration.
"It's similar to when you have a small trace amount of an element, you can test it because it's so unique," Bustamante said.
However, both NRG-2 products contained 4-methylethcathinone (4-MEC) with a smaller, trace, amount of 4-methylmethcathinone (4-MM C) or mephedrone, possibly as an unwanted contaminant, making them illegal.
More than 10 years ago, leading figures of the Muslim community met and discussed the then small trace of extremism within the community.
Usually, this means that some small trace of chemical was used during the bottling process.
Our study focused on aluminum reagents, inspired by a report in which small traces of the piperazine 3 a were detected, using a related amine substrate.[ 12c, d] Initially, we tested our photochemical hypothesis on the imine 1 a using a cold white fluorescent bulb (Table 1).
