Christie received far too little for more than "qualitative" analysis through microchemistry. Her work focussed on plant microchemistry and the physiology and microscopic analysis of commercial furs. Today otolith microchemistry provides a simpler way to assess migration patterns of fish. Microchemistry Ltd/ASM Microchemistry Ltd was the only manufacturer of commercial ALD-reactors in the 1990s. In recent years otolith microchemistry has shown that this is not always the case. Otolith microchemistry has been used to accurately identify estuarine nursery areas of fish. Otolith microchemistry has been used to identify and delineate Atlantic cod stocks in Canadian waters.