The phrase "a certain amount of material" is correct and usable in written English.
It can be used when referring to an unspecified quantity of material in various contexts, such as academic writing, reports, or discussions about resources.
Example: "In order to complete the project, we need to gather a certain amount of material to ensure we have enough for our experiments."
Alternatives: "a specific quantity of material" or "an unspecified amount of material."
"I'll ask for a certain amount of material, and they'll show up with twice the amount we need," said Mr. Purnama, shaking his head in disbelief.
"But in a class of 20 students, with a certain amount of material we have to cover each day, how am I really going to do that?" ASSISTments, Thienpont told me, made this possible, echoing what I heard from another area math teacher, Barbara Delaney, the day before.
There is in this "matter of Britain" a certain amount of material ultimately based on the belief probably Celtic in origin in an otherworld into which men can penetrate, where they can challenge those who inhabit it or enjoy the love of fairy women.
Mill products are always tested for their size analysis and their fineness is usually expressed as the size d through which a certain amount of material passes, i.e. d80.
In this research, three optimization problems including minimization of the mean compliance considering a certain amount of material, minimization of weight with avoiding local stress concentration as well as minimization of weight and strain energy under local stress constraints are dealt with.
I didn't have to wait to own a certain amount of material goods to be responsible for my own generosity or my own happiness.
A certain amount of organic material is used to sustain the life of producers; what remains is net productivity.
To develop a nuclear weapon Iran needs a warhead design, a certain amount of fissile material, and a delivery vehicle such as a missile.
There was a certain amount of scientific material that I had to look into, but I made it a point to keep this aspect of the work within strict limits.
As illustrated by Figure 2e,f, a significantly uniform thin film has been formed inside the TiO2 NTAs, though the surface at the open end of the NTAs was still covered by a certain amount of deposited material.
But a certain amount of cipher material ... due to faulty transmission or ... reception, or to various other causes, always remains unread ... ...... Information obtained from Enigma decryption seems to have been directed from B.S.-4 principally to the German Office of the General Staff's Section II (Intelligence).
