The invention discloses a determination method of total aluminum content in steel and
alloy. The method comprises the steps of pretreatment and determination, and particularly comprises the following steps: adding
distilled water,
hydrochloric acid and
nitric acid to a sample to be determined to heat and dissolve at low temperature; filtering by
slow speed filter paper; taking filtrate as main liquid, fusing the residue by using
sodium pyrosulfate, leaching by
hydrochloric acid, and merging the main liquid; fixing the volume by using the
distilled water, so as to obtain a sample solution to be determined; and determining by using a
spectrograph, so as to obtain the target content data. By adopting the determination method, the defects that the wet-
process analysis operation process is complicated, the operation is not easy to grasp, more interference elements exist, more chemical reagents are used and the like are avoided, and the characteristics that a
plasma emission spectrum is low in
detection limit, good in accuracy, small in matrix effect and the like are fully and effectively utilized. The determination method disclosed by the invention is simple and convenient to operate, less in
reagent dosage, high in analysis accuracy, short in detection period, and small in environmental
pollution, and the determination requirements of total aluminum content in daily steel and
alloy can be met.