prepgc - ga chromatography 4 Why must the injection port...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
E XPE RI M E N T : P R E P A R A T I V E G AS C H R O M A T O G R A P H Y Name _______________________________________ Instructor ____________________________________ Chem ____________ Section/Color ______________ Date ________________________________________ Laboratory Questions These questions are to be completed and turned in at the beginning of the pre-lab period. PR E-L A B Q U EST I O NS 1. What types of samples cannot be analyzed by gas chromatography? 2. Give examples of gases that make suitable 'carrier gases'? 3. Explain how some s olid ampl e (compounds that are solids at room temperature) can be analyzed by
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: ga chromatography. 4. Why must the injection port and detector always be heated to higher temperatures than the column in a gas chromatograph? 1 pt 1 pt 2 pts 1 pt High-boiling compounds Aqueous Solutions Nitrogen, Neon, Argon Any two gets full credit The solids would have to be a gas at the oven/column temperature, and the solid would have to initially be dissolved in a solvent. The detector is hotter to ensure the volatile components will not cendense in the detector. The injection port is hotter to ensure the sample becomes vapoized and also to pre-heat the carrier gas....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online