The phrase "insufficient quantities" is correct and can be used in written English.
It is generally used to refer to a shortage of something. For example, "The store was unable to fulfill the order due to insufficient quantities of the requested item."
"The baking soda toothpastes on the market have insufficient quantities of cleaning agent and high concentrations of flavoring".
If the growth hormone is produced in insufficient quantities, the result is dwarfism; if it is produced in excessive quantities, the result is gigantism.
If the hormone is absent or is produced in insufficient quantities because of damage to the pancreatic cells that secrete it, the result is classical (or type 1) diabetes.
Below 10 MeV proton beam energy, the authors reported a yield of insufficient quantities of 89Zr.
The Hanjiang River has higher sediment levels at 0.28 kg m−3 but insufficient quantities of water.
Purification of ovomucin is still an empirical technique and sometimes insufficient quantities of ovomucin are purified to allow characterization.
In general, the type of feed only slightly affects the composition of milk, but feed of poor quality or insufficient quantity causes both a low yield and a low percentage of total solids.
HM contains insufficient quantity of protein for preterm infants.
Forensic DNA casework samples are often of insufficient quantity or quality to generate full profiles by conventional DNA typing methods.
"However, a report was received from the technical delegate that showed during post-qualifying scrutineering an insufficient quantity of fuel for sampling purposes.
The results indicated that it possesses the ability of taking advantage of the high accuracy and overcomes the insufficient quantity of the natural frequencies for damage detection.
