TY - JOUR N2 - We present an alternative method to detect and measure the concentration changes in liquid solutions. The method uses Digital Holographic Interferometry (DHI) and is based on measuring refractive index variations. The first hologram is recorded when a wavefront from light comes across an ordinary cylindrical glass container filled with a liquid solution. The second hologram is recorded after slight changing the liquid’s concentration. Differences in phase obtained from the correlation of the first hologram with the second one provide information about the refractive index variation, which is directly related to the changes in physical properties related to the concentration. The method can be used − with high sensitivity, accuracy, and speed − either to detect adulterations or to measure a slight change of concentration in the order of 0.001 moles which is equivalent to a difference of 0.003 g of sodium chloride in solutions. The method also enables to measure and calculate the phase difference among each pixel of two samples. This makes it possible to generate a global measurement of the phase difference of the entire sensed region. L1 - http://www.journals.pan.pl/Content/107349/PDF-MASTER/118.pdf L2 - http://www.journals.pan.pl/Content/107349 PY - 2017 IS - No 1 DO - 10.1515/mms-2017-0002 KW - Digital Holographic Interferometry KW - refractive index measurements KW - phase difference KW - full-field measurements A1 - Guerrero-Méndez, Carlos A1 - Tonatiuh Saucedo-Anaya A1 - Araiza-Esquivel, Maria A1 - Balderas-Navarro, Raúl E. A1 - López-Martínez, Alfonso A1 - Olvera-Olvera, Carlos PB - Polish Academy of Sciences Committee on Metrology and Scientific Instrumentation VL - vol. 24 DA - 2017.03.30 T1 - Measurements of Concentration differences between Liquid Mixtures using Digital Holographic Interferometry UR - http://www.journals.pan.pl/dlibra/publication/edition/107349 T2 - Metrology and Measurement Systems ER -