Foodstuffs. Determination of trace elements. Determination of total arsenic and selenium by hydride generation atomic absorption spectrometry (HGAAS) after pressure digestion
State system for ensuring the uniformity of measurements. State verification scheme for measuring instruments of sound pressure in water within frequency range from 1*10 -3 to 1*10 6 Hz
State system for ensuring the uniformity of measurements. Single-crystal silicon nanometer range relief measures. Geometrical shapes, linear size and manufacturing material requirements
