Analytical chemistry refers to the study of substance's structure and constituents. Thus, it refers to the mathematical method and art of identifying and quantifying matter. The study of analytical chemistry serves as a difficult area that advances several scientific disciplines. It offers a strategy for addressing chemical issues, not only a set of analytical tools and a grasp of equilibrium chemicals. Analytical chemistry represents a subfield of chemistry concerned with the study of chemical analysis. Qualitative analysis refers to the process of identifying the components of the mixture and substance, whereas quantitative analysis focuses on the concentration of those components. The assay technique is another name for this. Quantitative analysis encompasses many different techniques, including volumetric evaluation, gravimetric evaluation, electrochemical techniques, and chromatographic techniques, along with biological approaches. This book comprises of topics like sampling, Pre-treatment of samples, Basic tools of Analytical chemistry, Errors, Central tendency measurements, Measurement of uncertainty, Concentration, Introduction of Basic Equipment for measuring the mass and volume, Chromatography, Theory of critical state of matter and supercritical state etc.