Instrumental Methods of Analysis Flashcards

All 5 cards in this deck

What three advantages do instrumental methods of analysis have over chemical tests?

They are more sensitive, more accurate and faster.

Which instrument is used to identify and measure metal ions in dilute solutions?

A flame photometer (flame emission spectroscopy).

How are metal ions in a sample identified from flame photometer data?

By comparing the sample's emissions with reference data for known metal ions.

How is a flame photometer calibration curve produced?

By measuring the readings of solutions of known concentration and plotting reading against concentration.

True or false? A flame test can show that both sodium and potassium ions are present in the same sample.

False.
The bright yellow sodium flame masks the lilac potassium flame; a flame photometer shows both sets of emissions.