Flame Emission spectrophotometry

Which component helps isolate the wavelength to be measured?

• Nebulizer

• Flame

• Monochromator

• Photo detector

In the internal standard method, lithium is used as an internal standard for:

• Calcium and magnesium

• Sodium and potassium

• Iron and zinc

• Copper and lead

Which of the following is NOT an advantage of flame photometry?

• Simple and quick

• Inexpensive

• Convenient and selective

• Suitable for heavy metals

The principle of flame photometry is based on:

• Absorption of light

• Emission of light by excited atoms

• Reflection of light

• Refraction of light

Which of the following causes interference in flame photometry?

• Mutual excitation

• Stable flame temperature

• Constant gas pressure

• High wavelength selectivity

The wavelength emitted by atoms in flame photometry is specific for each element.

• True

• False

The photodetector in a flame photometer converts emitted light into an electrical signal

• True

• False

The internal standard acts as a standard rather than a reference signal.

• True

• False

Flame photometry is ideal for measuring heavy and transition metals.

• True

• False

The intensity of emitted light in flame photometry is directly proportional to the concentration of the element in the sample.

• True

• False