All calibration procedures assume that the labeled values of the calibration buffers are correct. But buffer values can change over time and so can your results. A ...
The industry's products are used as basic chemicals for industrial processes (e.g., acids, bases, salts, oxidizing agents, gases, halogens), chemical additives (pigments, alkali metals, colors), and ...
and other elements to create inorganic salts. These salts can enter the air via dust from mining deposits of ores that contain mercury, as well as from emissions from coal-fired power plants ...