OREAS has been producing CRMs since 1988. Joined AnalytiChem Holding GmbH in 2021. Serves over 135 countries worldwide
Chemistry studies matter, including atoms, compounds, and chemical reactions. Five main branches: organic, inorganic, analytical, physical, and biochemistry. Biochemistry sometimes considered subdiscipline of organic chemistry. Chemistry overlaps with physics, biology, and engineering
Primary standards are pure, easily weighed reagents representing substance moles. Used in titration to determine unknown concentrations. Must be high purity, stable, and hygroscopic. Common examples include NaCl for AgNO3 and KHP for perchloric acid
Gravimetric analysis determines analyte mass based on its mass. Four main types: precipitation, volatilization, electro-analytical, and miscellaneous methods. Methods involve changing analyte phase to separate pure form
Benzotriazole is an oily, colorless or brownish liquid with aromatic odor. Derived from benzene by replacing one hydrogen atom with -NH2 group. Highly toxic and may cause industrial poisoning
Manufactured by YMC, sourced from US, Japan, and China. Modified silica gel particles with octadecylsilyl (C18) functional groups. Used as stationary phase in reversed-phase HPLC