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43302

Sigma-Aldrich

Micro particles based on polystyrene

size: 100 nm

Sinônimo(s):

Latex beads from PS

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5 ML
R$ 2.884,00
10 ML
R$ 5.093,00

R$ 2.884,00

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5 ML
R$ 2.884,00
10 ML
R$ 5.093,00

About This Item

Número MDL:
MFCD00243243
Código UNSPSC:
12352116
NACRES:
NA.32

R$ 2.884,00

Check Cart for Availability
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Formulário

aqueous suspension

concentração

10% (solids)

tamanho de partícula

100 nm std dev ≤0.01 μm

densidade

1.05 g/cm3

temperatura de armazenamento

2-8°C

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Descrição geral

Micro Particles or Latex Beads, commonly known as polystyrene microparticles, are negatively charged colloidal particles. The microparticles are produced through a polymerization reaction of styrene under controlled conditions. The conducive environment of the reaction induces spontaneous coalescent bead formation. Micro Particles or Latex beads are supplied in aqueous solutions composed of polymer particles with water. Polystyrene′s refractive index at 589 nm is 1.5905 and 1.602 at 486 nm.

Aplicação

Micro Particles or Latex Beads is used for a wide variety of applications like:
  • Electron Microscopy.
  • Cell Counter Calibration.
  • Immunodiagnostics, especially for latex agglutination tests, and
  • Phagocytosis Research.

Nota de análise

For every lot exact values of particle size and standard deviation are determined with an accuracy of 0.01 μm using a Coulter Multisizer.

Código de classe de armazenamento

10 - Combustible liquids

Classe de risco de água (WGK)

WGK 3

Ponto de fulgor (°F)

Not applicable

Ponto de fulgor (°C)

Not applicable

Equipamento de proteção individual

Eyeshields, Gloves

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Certificados de análise (COA)

Lot/Batch Number
BCCM8545
BCCM7572
BCCM6716
BCCM6693
BCCM5436

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Se precisar de uma versão específica, você pode procurar um certificado específico pelo número do lote ou da remessa.

Pesquise por COA

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Thomas Tschernig et al.
Experimental and toxicologic pathology : official journal of the Gesellschaft fur Toxikologische Pathologie, 65(6), 883-886 (2013-01-16)
Microparticles (MP) and fibres can be inhaled and cause inflammatory lung diseases. So far MP and fibres have not observed directly in the lung of living animals. A direct visualisation of particles and fibres would be important to study interactions
César Costa Vera et al.
Rapid communications in mass spectrometry : RCM, 19(2), 133-146 (2004-12-14)
The delayed ion extraction method has been used to study characteristics of the initial velocity distributions of positive and negative ions produced simultaneously by laser desorption/ionization (LDI) from non-impacted single aerosol polymeric particles, using a bipolar time-of-flight (TOF) instrument (LAMPAS
Jessie E P Sun et al.
Integrative biology : quantitative biosciences from nano to macro, 4(1), 84-92 (2011-11-29)
Integrins play a key role in cell-cell and cell-matrix interactions. Artificial surfaces grafted with integrin ligands, mimicking natural interfaces, have been used to study integrin-mediated cell adhesion. Here we report the use of a new chemical engineering technology in combination

Questions

1–4 of 4 Questions  

  1. When measured by UV-vis, at what absorption peak does this bead appear?

    1 answer

    1. The product was not test using the UV-vis system. Therefore, the data are not available.

      Helpful?

  2. Are the microparticles in a suspension sterile? Or is it possible to sterilize the suspension?

    1 answer

    1. The polystyrene microparticles offered for sale are not sterile.
      Although autoclaving is a common method of sterilization, polystyrene microparticles are not autoclavable. Filter sterilization is also not a practical method. There are no available protocols for sterilizing polystyrene microparticles. From the remaining methods for sterilization, it should be possible to sterilize in 70% ethanol for 30 minutes and then rinse away the ethanol with sterile water. For small batches, UV radiation would be another option.

      Helpful?

  3. What kind of surface modification are performed on these particles? 

    1 answer

    1. These particles possess a negative charge and have residual sulfate end groups as a result of the manufacturing process. This is not considered to be a functional group as would a carboxyl-, aldehyde-, or amine-functionalized product.

      Helpful?

  4. Tween 20과 같은 분산제가 함께 첨가되었는지 문의드립니다.

    1 answer

    1. Micro Particles or Latex beads are supplied in aqueous solutions composed of polymer particles with water. No surfactant has been added.

      Helpful?

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