초록 ▼

An improved microprocessor-controlled autosampler for use in liquid chromatography is shown. The autosampler is fully programmable by the operator and capable of performing complex sample preparation routines. A spring-loaded sample needle is employed to ensure that the needle makes contact with the

An improved microprocessor-controlled autosampler for use in liquid chromatography is shown. The autosampler is fully programmable by the operator and capable of performing complex sample preparation routines. A spring-loaded sample needle is employed to ensure that the needle makes contact with the bottom of the sample vial as required, for example, when handling extremely small samples. A hollow vial lifter serves as the receptacle for waste wash solvent eliminating the need for a special waste receptacle mechanism. Other improved features include a plurality of interchangeable, codable sample racks, a four-way valve in the syringe line enabling rapid priming/purging of the hydraulics, and as improved vial stabilizer design.

대표청구항 ▼

An autosampler for use in liquid chromatography comprising: carousel means for holding at least one vial rack having a plurality of recesses for receiving liquid-containing vials; a fixed needle assembly for withrawing liquid from said vial; vial lifter means in vertical alignment with said fixed ne

An autosampler for use in liquid chromatography comprising: carousel means for holding at least one vial rack having a plurality of recesses for receiving liquid-containing vials; a fixed needle assembly for withrawing liquid from said vial; vial lifter means in vertical alignment with said fixed needle assembly for lifting individual vials out of said vial recesses and impaling said vials on said needle assembly; means for moving said carousel to align said vial recesses with said vial lifter means; said needle assembly comprising a sample needle having a limited range of vertical travel such that the needle will move upward when it contacts the bottom of a vial being lifted.