ccd detectors metal h-10 9004 diffraction gratings spectrophotometer icp-oes h10 61 detectors h11 metal detector steel aluminum metal detectors rock grating spectrometer monochromator icp oes h10-61 h13 icp spectrometers icp emission spectrometers spectrometer gratings monochromators icp aes spectroscopy h10 diode array