Thermal lens and pH measurements in pure and adulterated brewed coffee

Instrumentation Science and Technology

Volumn 34, Issue 1-2, 2006, Pages 163-181

  Fontes, A S ^a,c   Bento, A C ^a   Baesso, M L ^a   Miranda, L C M ^b  

^a STATE UNIVERSITY OF MARINGÁ   (Brazil)

^b INSTITUTO NACIONAL DE PESQUISAS ESPACIAIS   (Brazil)

^c CEFET   (Brazil)

Author keywords

Coffee adulteration; Coffee brews; pH measurement; Thermal lens spectrometry

Indexed keywords

LENSES; PH EFFECTS; THERMAL EFFECTS;

COFFEE ADULTRATION; COFFEE BREWS; PH MEASUREMENT; THERMAL LENS SPECTROMETRY;

BEVERAGES;

EID: 31444451897     PISSN: 10739149     EISSN: 15256030     Source Type: Journal    
DOI: 10.1080/10739140500374187     Document Type: Article

References (27)

1. Simatos, D.; Karel, M. Characterization of the Condition of Water in Foods: Physico-Chemical Aspects. In Food Preservation by Water Activity Control; Scow, C.C., Ed.; Elsevier: Amsterdam, The Netherlands, 1988.
2. Phillips, R.D.; Finlay, J.W. Protein Quality and the Effects of Processing; Marcel Dekker: New York, 1989.
3. Roos, Y.H.; Karel, M. Plasticizing Effect of Water on Thermal Behavior and Crystallization of Amorphous Food Models. J. Food Sci. 1991, 56, 38-43.
4. Maroulis, Z.B.; Shah, K.K.; Saravacos, G.D. Thermal Conductivity of Gelatinized Starches. J. Food Sci. 1991, 56, 773-776.
5. Mattea, M.; Urbicain, M.J.; Rotstein, E. Prediction of Thermal Conductivity of Vegetable Foods by the Effective Medium Theory. J. Food Sci. 1986, 51, 113-134.
6. Hollinger, G.; Kuniak, L.; Marchessault, R.H. Thermodynamic Aspects of Gelatinization and Swelling of Crosslinked Starch. Biopolymers 1974, 13, 879-885.
7. Donovan, J.W. Phase Transition of Starch-Water System. Biopolymers 1979, 18, 263-270.
8. Rodriguez, M.E.; Yanez, J.M.; Cruz-Orea, A.; Alvarado-Gil, J.J.; Zelaya-Angel, O.; Sanchez-Sinencio, F.; Vargas, H.; Figueroa, J.D.; Martinez-Bustos, F.; Martinez-Montes, J.L.; Gonzalez-Hernandez, J.; Miranda, L.C.M. Influence of Slaked Lime Content on the Processing Conditions of Cooked Maize Tortillas: Changes of Thermal, Structural and Rheological Properties. Z. Lebensm. Unters. Forsch. 1995, 207, 236-240.
9. Rodriguez, M.E.; Yanez, J.M.; Alvarado-Gil, J.J.; Vargas, H.; Sanchez-Sinencio, F.; Figueroa, J.D.; Martinez-Bustos, F.; Martinez-Montes, J.L.; Gonzalez-Hernandez, J.; Silva, M.D.; Miranda, L.C.M. Influence of the Structural Changes During Alkaline Cooking on the Thermal, Rheological, and Dielectric Properties of Corn Tortillas. Cereal Chem. 1996, 73, 593-600.
10. Chandrasekar, V.; Viswanathan, R. Physical and Thermal Properties of Coffee. J. Agric. Eng. Res. 1999, 73, 227-234.
11. Prodolliet, J.; Brülhart, M.; Lador, F.; Martinez, C.; Obert, L.; Blanc, M.B.; Parchet, J.M. Determination of Free and Total Carbohydrate Profile in Soluble Coffee. J. AOAC Int. 1995a, 78, 749-761.
12. Kumazawa, K.; Masuda, H.; Nishimura, O.; Hiraishi, S. Change in Flavor of Coffee Drink During Heating. J. Jpn. Soc. Food Sci. Technol. 1998, 45, 108-113.
13. Pittet, A.; Tornare, D.; Huggett, A.; Viani, R. Liquid Chromatographie Determination of Ochratoxin A in Pure and Adulterated Soluble Coffee Using an Immunoaffinity Column Cleanup Procedure. J. Agric. Food Chem. 1996, 44, 3564-3569.
14. Baesso, M.L.; Silva, E.G.; Vargas, H.; Cortez, J.G.; Pelzl, J. Use of the Electron Spin Resonance for the Determination of Staling of Roasted Coffee in Polyethylene Bag Packs. Z. Lebensm. Unters. Forsch. 1990, 191, 24-27.
15. Zimering, B.L.; Boccara, A.C. Optimization of Parameters for Photothermal Mirage Sensor Design in View of in situ Environmental and Industrial Agricultural Applications. Instrum. Sci. Technol. 1998, 26, 261-279.
16. Cesar, C.L.; Lima, C.A.S.; Vargas, H.; Miranda, L.C.M. On the Use of the Photoacoustic Spectroscopy for Investigating Adultered Powdered Coffee Samples. J. Agric. Food Chem. 1984, 32, 1355-1361.
17. Prodolliet, J.; Brülhart, M.; Blanc, M.B.; Leloup, V.; Cherix, G.; Donnely, C.M.; Viani, R. Adulteration of Soluble Coffee with Coffee Husks and Parchments. J. AOAC Int. 1995b, 78, 761-767.
18. Rosencwaig, A. Photoacoustics and Photoacoustic Spectroscopy; Wiley: New York, 1980.
19. Vargas, H.; Miranda, L.C.M. Photoacoustic and Related Photothermal Techniques. Phys. Rep. 1988, 161, 43-101.
20. Fontes, A.S.; Bento, A.C.; Miranda, L.C.M.; Baesso, M.L. Thermal lens evaluation of the presence of adulterants in brewed coffee. Anal. Sci. 2001, 17, s526-s529.
21. Baesso, M.L.; Shen, J.; Snook, R.D. Time resolved thermal lens measurements of thermal diffusivity of soda lime glass. Chem. Phys. Lett. 1992, 797, 255-258.
22. Baesso, M.L.; Bento, A.C.; Andrade, A.A.; Sampaio, J.A.; Percoraro, E.; Nunes, L.A.O.; Catunda, T.; Gama, S. Absolute thermal lens method to determine fluorescence quantum efficiency and concentration quenching of solids. Phys. Rev. 1998, B57, 10545-10549.
23. Franko, M.; Tran, C.D. Thermal Lens Technique for Sensitive Kinetic Determination of Fast Chemical Reactions 2: Experiment. Rev. Sci. Instrum. 1991, 62, 2438-2442.
24. Baptista, M.S.; Tran, C.D. Structural Investigation of the Effects of Nonelectrolytes and Surfactants on Water by Thermal Lens Spectroscopy. J. Phys. Chem. 1995, 99, 12952-12961.
25. Shen, J.; Baesso, M.L.; Snook, R.D. 3-Dimensional model for CW laser induced mode-mismatched dual-beam thermal lens spectrometry and time resolved measurements of thin-films sample. J. Appl. Phys. 1994, 75, 3738-3748.
26. Shen, J.; Lowe, R.D.; Snook, R.D. A model for CW laser induced mode-mismatched dual-beam thermal lens spectrometry. Chem. Phys. 1992, 165, 385-396.
27. th Ed.; CRC Press, Inc: Boca Raton; 1986-1987.