Since its inception, PPB has maintained a clean legacy of upholding efficiency, quality, safety, and affordability of pharmaceutical products and services.
Meant to be used in both the teaching and research laboratory, this calculator see below can be utilized to perform dilution calculations when working with solutions having the following concentration units: parts per billion ppb , parts per million ppm , parts per thousand ppt , and parts per hundred pph, %.
For this reason, the system presents an opportunity for non-citizens interested to work in the country to earn a working permit.