The phrase "adequate quantities" is correct and usable in written English.
It can be used when discussing the sufficiency of amounts or volumes of something, often in contexts like supply, nutrition, or production.
Example: "To ensure the success of the experiment, we need to provide adequate quantities of each chemical reagent."
Alternatives: "sufficient amounts" or "ample quantities".
Aid cannot reach Darfur in adequate quantities unless the Sudanese government stops obstructing its delivery.
Training organization is needed in basic skills, both industrial and clerical, and for the provision of adequate quantities of trained technicians, supervisors, and competent managers.
On the other hand, insects cannot synthesize adequate quantities of cholesterol; thus, in effect, cholesterol can be defined as a vitamin for insects.
Choline appears to be an essential nutrient for a number of animals and microorganisms that cannot synthesize adequate quantities to satisfy their requirements.
According to Dr. Cooperman's written testimony, the most common problems are supplements that lack adequate quantities of the indicated ingredients and those contaminated with heavy metals.
Although these latter substances also are indispensable for proper bodily functions, almost all of them can be synthesized by animals in adequate quantities.
The agency is also asking for more information about sunscreen sprays to ensure that consumers get adequate quantities from spray bottles and to explore what happens when those products are inhaled.
Pigs have the same basic nutritional requirements as humans, which include water, various vitamins and minerals, protein for growth and repair, carbohydrates for energy, and fat to supply essential fatty acids that are not synthesized in adequate quantities.
It must deliver adequate quantities of water at pressures sufficient for operating plumbing fixtures and firefighting equipment, yet it must not deliver water at pressures high enough to increase the occurrence of leaks and pipeline breaks.
Animal food sources provide human beings with minerals considerably in adequate quantities.
Health, nutrition and food production, for example, all depend on the availability of water in adequate quantities and good quality.
