The ionic composition of interstitial and intravascular fluids is the same. Proteins, however, are kept with the vascular compartment, at least to a degree, by the vascular wall, which is a semi-permeable membrane. The concentration of proteins is much higher in the plasma sector than in the interstitial sector.
Detection of marijuana using swab drug test can vary from person to person taking into account the different conditions like general health, different fluid intake, metabolism, etc.
Saliva Drug Test. Saliva testing is the newest method to detect the presence of marijuana. This technology will detect the delta-9-tetrahydrocannabinol found in marijuana or Parent THC. This test is more appropriate for recent marijuana usage which could be for just a few hours up to 3 day.ow long Marijuana will show in a drug test. Marijuana is a oil based drug which will make it more detectable since is not water soluble and will allocate in the fat cells of the body. It is hard to tell how long marijuana will manifest in a drug testing because the time to detect its presence depends on many factors.