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Running UPLC

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8<br />

Preparing to Run <strong>UPLC</strong>; Injection and Detection Paramters<br />

Full Loop Injection<br />

Step 3 – Position sample and overfill the loop<br />

Sample Loop contains only sample<br />

No Air Gaps<br />

No weak wash<br />

Summary of Full Loop injection mode<br />

Best accuracy and precision performance<br />

Needs multiple loop volumes of additional sample to be used per<br />

injection<br />

Larger overfill factors are required for smaller loops<br />

Need to change injection loops to vary volume<br />

Dr. Shula Levin, Medtechnica<br />

Full Loop Injection<br />

Step 4 – Sample Injection<br />

Summary of Full Loop<br />

Injection Mode<br />

BENEFITS<br />

— Best accuracy and precision performance<br />

TRADEOFF<br />

— Needs multiple loop volumes of additional sample to be used per<br />

injection<br />

o larger overfill factors are required for smaller loops (buffer zone<br />

improvement)<br />

— Need to change injection loops to vary volume

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