P/A Factor what it it is?

Question

Hi, I am new to ICP-MS, can you please explain to me what P/A factor stands for?

cheopark · Accepted Answer

Simply, We could have wide dynamic range by P/A factor in calibration curve. If it has only pulse mode, its calibration curve is saturated easily. A pulse range has low concentration(low intensity) and a Analog mode has high concentration(high intensity). P/A factor is bridge for Pulse and Analog through calculated factor values. So, In Data analysis program you could check what range(not attached picture). In DA calibration curve, Blue point is pulse range. Pink point is P/A factor range. Green point is analog range.

kwangyong · Answer

A dedicated solution is required to readjust the P/A factor. PA factor tuning solution set – p/n 5188-6524 • Multi-element custom mixes to provide suitable signal for detector cross- calibration 100 ml each: • P/A Tuning-1 (in 2-5% HNO3) 20 ppm Zn, Be, Cd, As 10 ppm Ni, Pb, Mg 5 ppm Tl, Na, Al, U, Cu, Th, Ba, Co, Sr, V, Cr, Mn, Li(6), Sc, In, Lu, Bi 2.5 ppm Y, Yb • P/A Tuning-2 (in 10% HCl and 1% HNO3 with trace HF) 10 ppm Mo, Sb, Sn, Ge, Ru, Pd 5 ppm Ti, Ir

tadacci61 · Answer

Pulse/Analog Factor.

edgarvs · Answer

If the pulse or analog voltage isn't changed no need to adjust the p/a. The detector isn't related to the sample intro. so changed to the sample intro doesn't influent the working of the detector p/a factor. However, a re-adjustment of the p/a factor, if you doubt about the trueness, could always be run if the sensitivity of the p/a tune solution is ok.

P/A Factor what it it is?

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