In basic research, chemists investigate the properties, composition, and structure of matter and the laws that govern the combination of elements and reactions of substances. In applied research and development, they create new products and processes or improve existing ones, often using knowledge gained from basic research. Chemists also work in production and quality control in chemical manufacturing plants. They prepare instructions for plant workers which specify ingredients, mixing times, and temperatures for each stage in the process. They also monitor automated processes to ensure proper product yield, and they test samples to ensure they meet industry and government standards.
Chemists also record and report on test results.
Others are marketing or sales representatives who sell and provide technical information on chemical products. Chemists often specialize in a subfield. Analytical chemists determine the structure, composition, and nature of substances and develop analytical techniques. They also identify the presence and concentration of chemical pollutants in air, water, and soil. Organic chemists study the chemistry of the vast number of carbon compounds.