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| 001 | 894766 | ||
| 005 | 20220103172047.0 | ||
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| 100 | 1 | _ | |a Pourshahidi, Ali Mohammad |0 P:(DE-Juel1)173858 |b 0 |
| 245 | _ | _ | |a Multiplex Detection of Magnetic Beads Using Offset Field Dependent Frequency Mixing Magnetic Detection |
| 260 | _ | _ | |a Basel |c 2021 |b MDPI |
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| 520 | _ | _ | |a Magnetic immunoassays employing Frequency Mixing Magnetic Detection (FMMD) have recently become increasingly popular for quantitative detection of various analytes. Simultaneous analysis of a sample for two or more targets is desirable in order to reduce the sample amount, save consumables, and save time. We show that different types of magnetic beads can be distinguished according to their frequency mixing response to a two-frequency magnetic excitation at different static magnetic offset fields. We recorded the offset field dependent FMMD response of two different particle types at frequencies f1 + n×f2, n = 1, 2, 3, 4 with f1 = 30.8 kHz and f2 = 63 Hz. Their signals were clearly distinguishable by the locations of the extremes and zeros of their responses. Binary mixtures of the two particle types were prepared with different mixing ratios. The mixture samples wereanalyzed by determining the best linear combination of the two pure constituents that best resembled the measured signals of the mixtures. Using a quadratic programming algorithm, the mixing ratioscould be determined with an accuracy of greater than 14%. If each particle type is functionalized with a different antibody, multiplex detection of two different analytes becomes feasible. |
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| 700 | 1 | _ | |a Achtsnicht, Stefan |0 P:(DE-Juel1)168292 |b 1 |
| 700 | 1 | _ | |a Nambipareechee, Mrinal Murali |0 P:(DE-Juel1)177878 |b 2 |
| 700 | 1 | _ | |a Offenhäusser, Andreas |0 P:(DE-Juel1)128713 |b 3 |
| 700 | 1 | _ | |a Krause, Hans-Joachim |0 P:(DE-Juel1)128697 |b 4 |e Corresponding author |
| 773 | _ | _ | |a 10.3390/s21175859 |g Vol. 21, no. 17, p. 5859 - |0 PERI:(DE-600)2052857-7 |n 17 |p 5859 - |t Sensors |v 21 |y 2021 |x 1424-8220 |
| 856 | 4 | _ | |u https://juser.fz-juelich.de/record/894766/files/Paper%20%28open%20access%29.pdf |y OpenAccess |
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