Isopropanol

isoporIsopropanol
.
Exposición.
 El isopropanol es un alcohol alifático ampliamente usado en la industria, en medicina y en el hogar, como alcohol para frotar, loción cutánea, tónicos para elcabello, lociones para después del afeitado y líquidos limpiacristales. Al igual que el metanol, en ocasiones es ingerido por algunos alcohólicos, por ser más barato que el etanol
3.2.3 GC gradenitrogen, air, and hydrogen.
3.3 Standard preparation
3.3.1 Prepare working analytical standards by injecting microliter amounts of isopropyl alcohol into 4-mL vials containing 3 mL of desorption solventdelivered from the same dispenser used to desorb samples. An analytical standard equivalent to a 391-ppm air sample, with the recommended air volume of 18 L, was prepared by placing 22 µL of isopropylalcohol into a sealed vial containing 3.0 mL of desorbing solution. An analytical standard equivalent to a 426-ppm air sample, at the recommended air volume of 3 L, was prepared by placing 4µL ofisopropyl alcohol into a sealed vial containing 3.0 mL of desorbing solution for a concentration of 1.05 mg/mL.
3.3.2 Bracket sample concentrations with working standard concentrations. If sampleconcentrations are higher than the concentration range of prepared standards, prepare and analyze additional standards, at least as high a concentration as the highest sample, to ascertain the linearity ofresponse, or dilute the sample with the desorbing solvent to obtain a concentration within the existing standard range.
3.4 Sample preparation
3.4.1 Remove the plastic end caps from the sample tubesand carefully transfer the adsorbent to separate 4-mL vials. Discard the glass tube, urethane foam plug and glass wool plug.
3.4.2 Add 3.0 mL of desorption solvent to each vial using the samedispenser as used for preparation of standards.
3.4.3 Immediately seal the vials with poly(tetrafluoroethylene)-lined caps.
3.4.4 Shake the vials vigorously several times during the next 1 hour.
3.5...