Lanthanum AAS STANDARD SOLUTION is a fine chemical from the brand RESEARCH-LAB FINE CHEM INDUSTRIES. It is usually available as a clear colorless solution in dilute Nitric acid.Quantity: 125 ml/BottleAtomic absorption spectroscopy (AAS) is a spectro-analytical means for the quantitative evaluation of chemical elements via the absorption of optical radiation (light) by free atoms in the gaseous state. It is the most sensitive technique for the determination of metal impurities. AAS Standard Solutions required in the process are prepared by dissolution of the metal, at a purity level of 99.9%, in a suitable acid.