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.
Home remedies to pass a saliva drug test. If you know ahead of time the best way to pass a mouth swab drug test is to stop smoking weed for a day or two prior to taking the test. Be sure to brush your teeth thoroughly and use mouthwash daily too. Thatâs because marijuana can only be detected in the system by a spit test for 12 to 24 hours.