TY - JOUR
T1 - Magnetic levitation in the analysis of foods and water
AU - Mirica, Katherine A.
AU - Phillips, Scott T.
AU - MacE, Charles R.
AU - Whitesides, George M.
PY - 2010/6/9
Y1 - 2010/6/9
N2 - This paper describes a method and a sensor that use magnetic levitation (MagLev) to characterize samples of food and water on the basis of measurements of density. The sensor comprises two permanent NdFeB magnets positioned on top of each other in a configuration with like poles facing and a container filled with a solution of paramagnetic ions. Measurements of density are obtained by suspending a diamagnetic object in the container filled with the paramagnetic fluid, placing the container between the magnets, and measuring the vertical position of the suspended object. MagLev was used to estimate the salinity of water, to compare a variety of vegetable oils on the basis of the ratio of polyunsaturated fat to monounsaturated fat, to compare the contents of fat in milk, cheese, and peanut butter, and to determine the density of grains.
AB - This paper describes a method and a sensor that use magnetic levitation (MagLev) to characterize samples of food and water on the basis of measurements of density. The sensor comprises two permanent NdFeB magnets positioned on top of each other in a configuration with like poles facing and a container filled with a solution of paramagnetic ions. Measurements of density are obtained by suspending a diamagnetic object in the container filled with the paramagnetic fluid, placing the container between the magnets, and measuring the vertical position of the suspended object. MagLev was used to estimate the salinity of water, to compare a variety of vegetable oils on the basis of the ratio of polyunsaturated fat to monounsaturated fat, to compare the contents of fat in milk, cheese, and peanut butter, and to determine the density of grains.
KW - Analysis of food and water
KW - Density
KW - Magnetic levitation (MagLev)
UR - http://www.scopus.com/inward/record.url?scp=77953142706&partnerID=8YFLogxK
U2 - 10.1021/jf100377n
DO - 10.1021/jf100377n
M3 - Article
C2 - 20465289
AN - SCOPUS:77953142706
SN - 0021-8561
VL - 58
SP - 6565
EP - 6569
JO - Journal of Agricultural and Food Chemistry
JF - Journal of Agricultural and Food Chemistry
IS - 11
ER -