Pengukuran Sampel Magnetik Cair dengan Vibrating Sample Magnetometer (Vsm)

W Z Lubis, M Mujamilah

Abstract


This article discusses the performance of Vibrating Sample Magnetometer (VSM) Oxford 1.2 H in characterizing the magnetic samples in liquid form. Samples of water-based ferrofluid placed in a capillary tube pipe. Measurement of samples with varied position, volume and concentration as well as repeated measurements are carried out to evaluate the performance. From these series of measurements, it brings that optimal volume range with measurement results that can still be accounted for is 10 µl, with samples being in equilibrium position within the pick-up coil. The smallest sample concentration which still can be observed quantitatively is 0.332 mg/mL. Repeatability test gives the value of the magnetic moment deviation of ~ 4%. The accuracy of the sample preparation and positioning of the samples is analyzed being a major factor which causes this measurement error. In general it can be concluded that the liquid sample measurement will give better results when using reverse pipetting mode when putting the liquid samples within capillary tube using a micropipette. The measurement should be done as soon as possible after preparation.

DOI: https://doi.org/10.17977/um024v2i22017p039


Keywords


ferrofluid; Vibrating Sample Magnetometer (VSM);

Full Text:

PDF

References


[A. Joseph and S. Mathew, “Ferrofluids: Synthetic Strategies, Stabilization, Physicochemical Features, Characterization, and Applications,” ChemPlusChem, vol. 79, no. 10, pp. 1382–1420, 2014.

B. Issa, I. M. Obaidat, B. A. Albiss, and Y. Haik, “Magnetic nanoparticles: Surface effects and properties related to biomedicine applications,” Int. J. Mol. Sci., vol. 14, no. 11, pp. 21266– 21305, 2013.

N. Pérez, C. Moya, P. Tartaj, A. Labarta, and X. Batlle, “Aggregation state and magnetic properties of magnetite nanoparticles controlled by an optimized silica coating,” J. Appl. Phys., vol. 121, no. 4, p. 44304, 2017.

D. Mayer and P. Polcar, “A novel approach to measurement of permeability of magnetic fluids,” PRZEGLĄD ELEKTROTECHNICZNY Electr. Rev., vol. 88, no. 7, pp. 229–231, 2012.

Z. Boekelheide and C. L. Dennis, “Artifacts in magnetic measurements of fluid samples,” AIP Adv., vol. 6, no. 8, 2016.

T. Friedrich, T. Lang, I. Rehberg, and R. Richter, “Spherical sample holders to improve the susceptibility measurement of superparamagnetic materials,” Rev. Sci. Instrum., vol. 83, no. 4, 2012.

Mujamilah et al., “Vibrating sample magnetometer (VSM) tipe oxford vsm1.2h,” Pros. Semin. Nas. Bahan Magn. I, vol. di, pp. 77–81, 2000.

M. C. Mascolo, Y. Pei, and T. A. Ring, “Room Temperature Co-Precipitation Synthesis of Magnetite Nanoparticles in a Large ph Window with Different Bases,” Materials, vol. 6, no. 12, pp. 5549–5567, 2013.

K. Ewald, “Impact of Pipetting Techniques on Precission and Accuracy,” Eppendorf Userguide, no. 20, pp. 1–4, 2015.

M. Art, V. Dufey, U. Gast, I. Gligor, L. Koch, and R. Kubasch, “The Tip of the Iceberg: How Pipette Tips Influence Results,” Eppendorf Apl. Note, no. 354, pp. 1–22, Oktober 2016.


Refbacks

  • There are currently no refbacks.




Creative Commons License
This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License.