MUHWA 4.5mL Polystyrene Cuvettes — 4 Clear Optical Sides, 10mm Path Length, 340-750nm, 100 pcs/PK
MUHWA 4.5mL disposable polystyrene cuvettes with four clear optical sides deliver consistent, reliable performance for visible-range spectrophotometry, fluorescence measurements, and turbidity analysis. Each cuvette features polished transmission windows on all four faces. The 4-clear-side design allows light to pass through in any orientation, eliminating alignment errors and making these cuvettes ideal for fluorescence determinations where excitation and emission beams travel perpendicular paths. Every pack contains cuvettes from the same manufacturing mold, ensuring inter-cuvette variability below 0.005 absorbance units.
Key Features
- 4 Clear Optical Sides: All four sides are optically clear for consistent light transmission regardless of orientation. Essential for fluorescence spectroscopy where excitation and emission beams travel at 90 degrees to each other.
- 10mm Standard Path Length: Universal compatibility with spectrophotometer cuvette holders from Thermo Fisher, Beckman Coulter, Shimadzu, Hitachi, Bio-Rad, and all educational-grade instruments.
- Optical-Grade Polystyrene (PS): Excellent clarity across 340–750 nm. Suitable for Bradford assays (595nm), BCA assays (562nm), bacterial OD600 measurements, enzyme kinetics, and colorimetric analysis.
- Same Mold Precision: Cuvettes within each pack originate from the same injection mold cavity, ensuring matched optical characteristics. Inter-cuvette absorbance variability below 0.005 AU.
- 4.5mL Standard Volume: Compatible with routine spectrophotometric assays requiring 1.5–4.0 mL working volume. The 12 x 12 x 45mm external footprint matches all standard 10mm cuvette holders.
- Disposable Single-Use: Eliminates cross-contamination risk between samples. No washing, no detergent residue, no carryover.
Technical Specifications
| Parameter | Specification |
|---|
| Type | 4 Clear Sides |
| Capacity | 4.5 mL (standard) |
| Optical Path Length | 10 mm |
| Material | Optical-grade polystyrene (PS) |
| Spectral Range | 340–750 nm (visible + near-UV) |
| External Dimensions | 12 x 12 x 45 mm |
| Inter-Cuvette Variability | Below 0.005 absorbance units (same mold) |
| Pack Size | 100 cuvettes per pack |
| Packaging | Stackable tray (100/tray) |
| Sterility | Non-sterile |
Applications
- Fluorescence Spectroscopy: The 4-clear-side design is purpose-built for fluorescence measurements with perpendicular beam paths.
- Turbidity Measurements: All four transparent sides enable accurate turbidimetric and nephelometric measurements.
- Protein Quantification: Bradford (595nm), BCA (562nm), Lowry (750nm) assays. Disposable format eliminates protein carryover.
- Bacterial Cell Density (OD600): Routine optical density measurements for monitoring bacterial growth curves.
- Teaching Laboratories: Economical bulk pack enables each student to use fresh cuvettes.
- Quality Control: Routine absorbance verification in pharmaceutical and food manufacturing QC labs.
Frequently Asked Questions
Q: Can these be used for DNA quantification at 260nm?
A: No. Polystyrene absorbs below 340nm. For UV applications use PMMA or quartz cuvettes.
Q: Do I need to orient the cuvette?
A: No — all four sides are identical. Simply place it in the holder.
Q: What solvents are compatible?
A: Aqueous buffers, saline, dilute alcohols (below 20% ethanol). Avoid acetone, chloroform, concentrated acids.
