International Stable Isotope Reference Materials

摘要: Publisher Summary This chapter discusses the most important international stable isotope reference materials that define six scales for elements hydrogen, carbon, nitrogen, oxygen and sulfur. The availability proper use of suitable is one basic preconditions to ensure comparability ratio measurements as performed by different laboratories. Comments are given on lithium, boron chlorine. Certain requirements used have be fulfilled problem a terminology terms proposed general with intention achieve better consistency discussed in chapter. available intended calibrate local laboratory standards prepared individual not themselves quality control purposes. rules should applied an optimal calibration using materials, regardless element under consideration listed. recent situation, demands future trends new also discussed.