Instrumentasi Kimia II

What is chromatography?

• A way to see pretty colors

• A form of distillation

• A laboratory technique used to separate a mixture.

If a sample is less polar the choice of the separation column in Gas chromatography should be

• polar column

• non polar column

The retention factor is used

• to zero the chromatography scale

• to retain solvent

• to identify unknown compounds in a sample

• as a starting tool for chromatography

What does 'ICP-MS' stand for?

• Inductively coupled plasma mass spectrometry

• Inductively coupled proton mass spectrometry

• Intensively coupled plasma mass spectrometry

• Interaction coupled proton mass spectrometry

Name an ionization technique which uses a coronal discharge needle to form molecular ions prior to charge transfer with an analyte

• Electrospray Ionization

• Atmospheric Pressure Photoionization

• Matrix –Assisted Laser Desorption Ionization

• Atmospheric Pressure Chemical Ionization

GC- MS has been developed for which of the following systems?

• Packed column

• Open tubular column

• Capillary column

• Porous layer column

Which of the following problems occur when combining gas chromatography and mass spectroscopy?

• Difference in operating pressures

• Reduction in sensitivity

• Direct identification is not possible

• It does not permit direct introduction of the effluent

Which of the following is the type of separator used in commercial GC-MS systems?

• Jet type molecular separator

• Porous tube

• Teflon tube

• Flow type separator

ICP is used to analyse samples in which of the following states?

• Solids

• Liquids

• Gas

• Solids and liquids

Which of the following is not the characteristic of ICP spectrometer?

• Easy sample introduction

• It can trace multiple elements

• High detection limits

• Accurate