Polystyrene beads are available in several formats - unmodified, carboxyl-modified, or amine-modified - as well as various colors and numberous sizes. This particular product is an amine-modified bead containing a blue fluorescent dye. See the image below to review the basic structure. This is a surface modification that allows for the attachment of certain ligands such as polypeptides via the carboxyl-terminus. The dyes are embedded in the polystyrene bead during the manufacturing process. These are not bound to the surface of the bead.
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L1403
Latex beads, sulfate-modified polystyrene, fluorescent orange
aqueous suspension, 0.5 μm mean particle size
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form
aqueous suspension
composition
Solids, 2.5%
mean particle size
0.5 μm
fluorescence
λex ~520 nm; λem ~540 nm
Application
Sulfate-modified polystyrene latex beads have been used to develop an electrochemical nitrite nanosensor as well as in voltammetric studies. Sulfate-modified polystyrene latex beads have been used to explain the partitioning behavior for certain species of bacteria.
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|---|---|---|---|
| form aqueous suspension | form aqueous suspension | form aqueous suspension | form aqueous suspension |
| mean particle size 0.5 μm | mean particle size 0.1 μm | mean particle size 2.0 μm | mean particle size 1.0 μm |
| fluorescence λex ~520 nm; λem ~540 nm | fluorescence λex ~520 nm; λem ~540 nm | fluorescence λex ~520 nm; λem ~540 nm | fluorescence λex ~520 nm; λem ~540 nm |
| composition Solids, 2.5% | composition Solids, 2.5% | composition Solids, 2.4-2.6% | composition Solids, 2.4-2.6% |
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Lagerklasse
10 - Combustible liquids
wgk
WGK 2
flash_point_f
Not applicable
flash_point_c
Not applicable
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Does the polystyrene bead have amine groups attached to the bead surface? What is the purpose of this modification? How is the dye bound to these beads.
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