The phrase "a vital parameter" is correct and usable in written English.
It can be used when discussing an important factor or variable that significantly affects a situation or outcome.
Example: "In our research, we identified temperature as a vital parameter influencing the reaction rate."
Alternatives: "an essential factor" or "a crucial variable."
Conversion efficiency is a vital parameter behind successful generation of hydrogen gas.
In the material environment configuration, the component surface is a vital parameter in determining its optimum performance.
It should be noted that the reaction temperature is a vital parameter that affects the reaction rate and generation efficiency.
The pH of the PB solution is a vital parameter to determine the electrocalytic activity of the developed biosensor.
Low molecular weight & polydispersity is a vital parameter for efficient scale inhibition which is achieved through uniform reaction rate.
The motion of tracer particles was calculated using species transport equation, where the diffusion coefficient of particles, a vital parameter indicating particle diffusion capacity, was investigated thoroughly.
A single vital parameter or even a set of absolute values of vital parameters will rarely suffice.
The study is mainly focused on the effect of curvature of stretching cylinder, which is a very vital parameter affecting both flow and temperature fields.
In current production systems for each evaluation of a vital process parameter a different software system is used.
This study extends the understanding of the role of solution viscosity as a vital material parameter for electrospinning of fibers.
For both microbial and mammalian fermentations, pH is a vital process parameter as it has a marked affect on cell growth rate, viability and product synthesis.
