Quantitative criteria for needle trap device selection

In this note the quantitative criteria for selection of parameters of the NTD system were derived. The conditions were formulated for the force exerted on syringe, the volume of tested solution, for the time of test and contact time of solution with the sorbent. The last two conditions allowed to establish limits for combinations of fundamental geometrical and macroscopic structural characteristics of the system. The practical reasons of testing and sampling effectiveness of the NTD systems were taken into account.