Source Certain use both Agilent ICP-MS (single and triple quadrupole versions) and Agilent ICP-OES instruments. Source Certain have six Agilent atomic spectroscopy instruments in their new state-of-the-art lab. Their new 8900 ICP-QQQ is allowing them to see things they have never seen before in the samples, with some detection limits at parts-per-quadrillion levels.