PORTABLE FLAME PHOTOMETER AND SAMPLING PROBE

摘要

A hand-held sampling probe remotely connected to a portable flame photometer enables immediate on-site identification of a desired piece of steel in a mixed stockpile thereof according to a percentage concentration of manganese element in the steel. An operator causes the sampling probe to strike a low-voltage electric arc on a sampling surface of the test piece so as to generate an aerosol of atmospheric air and sample particles. An induction burner located in the flame photometer is fueled by a self-contained propane bottle and is adjusted to aspirate the aerosol and excite the sample particles in low-energy flame. Photoelectric circuits analyze the flame spectra and accumulate concentrations of iron as an internal standard and manganese as the identifying element. When the iron concentration reaches a predetermined value, a control unit interrupts the electric arc and element accumulations and displays percent manganese concentration on a meter without ratioing iron and manganese signals.