An alternate technique for preparing standards of volatile organic compounds on sorbent cartridges is proposed. The system incorporates temperature controlled diffusion tubes, a multiple syringe pump and gas chromatograph. Analysis of organics on the cold trap offers a quality assurance step prior to and during cartridge loading. Analysis of traps and cartridges are highly precise. Organic vapors have been loaded onto Tenax-GC cartridges, stored for up to one month and analyzed. These results are discussed. Although all applications of this system have been to Tenax, other sorbents or collection techniques could be calibrated with this system. results obtained with the syringe pump system will be compared to techniques for standard preparation.