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Qiu-ting Huang; Yi-dan Zuo; Zhu Zhu; Liu Yang; Zhong-qun Tian; Guo-kun Liu – Journal of Chemical Education, 2024
Nitrate is a crucial parameter for assessing water quality, owing to its dual function in ecological systems. These functions can be beneficial or detrimental depending on whether nitrate concentrations are low or high, respectively. The ultraviolet spectrophotometric method (standard as 4500-NO[subscript 3]--B) is a classic method for determining…
Descriptors: Organic Chemistry, Scientific Concepts, Laboratory Experiments, Laboratory Procedures

Veillon, Claude – Analytical Chemistry, 1986
Reviews background of atomic absorption spectrometry techniques. Discusses problems encountered and precautions to be taken in determining trace elements in the parts-per-billion concentration range and below. Concentrates on determining chromium in biological samples by graphite furnace atomic absorption. Considers other elements, matrices, and…
Descriptors: Chemical Analysis, Chemistry, College Science, Data Analysis