Statistics for forensic toxicology - analytical techniques - ICP-MS

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Hint	Answer	% Correct
	a detector (mass spectrometer)	0%
how does ICP-MS present its data?	already in the form of a concentration	0%
what are the two components that make ICP-MS a hyphenated technique?	an ionisation source (inductively-coupled plasma)	0%
what additional preparation do complex solid samples need for ICP-MS analysis?	a period of digestion in acid (often at high temperature)	0%
what are the limitations for ICP-MS?	atoms with a mass of 40 cannot be measured	0%
	because argon will combine with oxygen to form ArO, which has a mass of 56, the same as the mass of iron	0%
why is it used instead of ICP-MS?	because it is a much cheaper technique	0%
why is the plasma ICP-MS uses for analysis called inductively-coupled plasma?	because it is ionised by inductive heating of a gas with an electromagnetic coil	0%
why does ICP-MS have these limitations?	because it uses argon, which also has a mass of 40	0%
	both raw and corrected data	0%
	collisions between argon atoms and electrons	0%
how do we prepare solids for ICP-MS analysis?	dissolve them using an acid, most commonly nitric acid (HNO3)	0%
what is it also used for?	environmental and industrial monitoring	0%
	eventually equilibrium is reached and stable plasma is achieved	0%
what does the mass spectrometer do to this prepared sample now?	focusses the atoms through an ion beam	0%
what gas is used to generate ICP?	high-purity argon gas	0%
how are samples typically prepared for ICP-MS analysis?	in a liquid state or solids that are fully dissolved	0%
how do we want to introduce the samples to the instrument?	in as little liquid as possible	0%
what is ICP-AAS?	inductively-coupled plasma atomic absorption spectrometry	0%
what is ICP-MS?	inductively-coupled plasma mass spectrometry	0%
what is its major downside?	it can only analyse a single element at a time	0%
how does this instrument work?	it converts a liquid to an aerosol (a fine mist) using a nebulising gas which can then be drawn into the plasma	0%
	it is very difficult to measure iron	0%
what does this produce, and what does that then allow?	it produces ions & electrons, and allows the gas to conduct electricity	0%
in simple terms, what has been done to the sample to prepare it for analysis?	liquid has been removed	0%
what is the range of its ability to profile elements? (element names or molecular weights)	lithium (MW: 7) to uranium (MW: 250)	0%
what is it used for primarily?	metal analysis for toxicology	0%
	microwave	0%
how does it generate ICP?	more and more energy is added to the system by increasing the temperature	0%
what is the most common mass spectrometer for ICP-MS?	quadrupole mass analyser	0%
	separates the atoms by size & allows them to be detected	0%
	some of the argon atoms to lose electrons	0%
once this is complete, what can happen now?	the atoms can be analysed using the mass spectrometer	0%
	the atoms have been ionised	0%
once the sample has been introduced to the instrument, what happens to the sample?	the molecules are broken down to their constituent atoms by extreme heat	0%
	the molecules have been broken down into atoms	0%
	the plasma is electrically charged, ionising the atoms	0%
	until	0%
how is this achieved?	using an instrument called a nebuliser	0%
	which causes	0%
	which causes	0%