The phrase "added one single" is correct and usable in written English.
It can be used when emphasizing the addition of a singular item or unit to a quantity or list.
Example: "After reviewing the data, I added one single entry to the report to ensure completeness."
Alternatives: "included one" or "added a single".
"Theoretically, if you have it on the Y," Prof Crisanti added, "one single individual could knock out an entire population".
"I do not recall that Holst added one single note of his own to anything I wrote, but he would suggest if I agreed!—that, given such and such a phrase, the following one would be better if it took such and such a course; if I did not see this, the point would not be insisted upon .
She says campaigners fail to understand that these towers "will not add one single square foot of built density to the city", given that allowable density is finite.
Mobli, the social-mobile photo and video-sharing app which competes with Instagram and the like, has a major update out today that adds one, single important new feature: live broadcast streaming.
But let's play with it a little: Let's suppose you started a town and added one person for every single day since Jesus was born.
Pyrosequencing is an automated process in which solutions of the four DNA-building nucleotides or "bases" (G,C,T,A) are added, one at a time, to single strands of DNA from sampled cells in order to build up a complementary matching strand.
That single conversation probably added one year to the writing, as Tim and I went off in a particular direction and the genre of the film changed a lot.
Analysing the networks generated by our growth model, where metabolic reactions are added one by one starting from a single reaction node without any evolutionary pressure, we found that they show a very well defined metabolic core.
Next, a single-base extension added one of two possible fluorescent probes (one for methylated (C) and one for unmethylated (T) alleles).
This (hopefully) single cell suspension is added one well of a 96 well dish with irradiated feeders.
Compared to the single-reflector design, we added one additional glass to reflect acoustic waves by another 90 degrees.
