<prompt> All of the following method used for detecting heavy metals, except -Harrison Gilroy testParaffin testNeutron activation analysisAtomic adsorption spectroscopy  <response>: Tests used in firearm dischargeBased on detection of nitrate : Dermal nitrite Paraffin test.Based on detection of heavy metal: Harrison and Gilroy test, neutron activation analysis, Atomic absorption spectroscopy, and flameless atomic absorption spectroscopy. 