10mm 20mm 50mm 100mm path length clear cylinder quartz cuvette with PTFE stopper for spectrophotometer

Brief

1.What is a Quartz Cuvette Cell?

A quartz cuvette cell is a fundamental tool in the realm of spectroscopy, serving as a vessel for holding liquid samples during analysis. Its construction material, quartz glass, possesses exceptional optical properties, such as high transparency and resistance to chemical reactions, making it the ideal choice for this purpose. These cells come in various shapes and sizes, but the most common is the rectangular cuvette with two transparent windows. These windows allow light to pass through the sample, enabling precise measurements of light absorption and transmission.

Quartz cuvette cells are engineered to withstand the harsh conditions of scientific experimentation. They are used in a variety of industries, including chemistry, biology, and environmental science, to analyze the properties of substances by measuring how they interact with light. These interactions provide crucial insights into the composition, concentration, and characteristics of the samples under investigation.

In essence, a quartz cuvette cell acts as the "eyes" of a spectrophotometer, providing a clear view into the world of molecules and compounds. It plays a pivotal role in enabling scientists to unravel the mysteries of matter at the molecular level.

2.Choosing the Material for Cuvettes: Quartz or Glass?
The phenomenon of choosing or using cuvettes improperly, leading to the inability to measure or causing measurement errors, often occurs in experiments and is easily overlooked by laboratory personnel.

The definition of the ultraviolet (UV) region is 190-400nm , and quartz cuvettes can be used in the range of 190-900nm, while glass cuvettes are suitable for 360-900nm. For the UV region, quartz cuvettes must be used, and it is necessary to configure a UV/Visible spectrophotometer ; otherwise, analysis in the low-wavelength range cannot be conducted.

Due to the broad transmittance range of quartz cuvettes from 0.12-4.5 micrometers (120nm -450nm) , there is no absorption peak in a wide spectral range. In contrast, glass cuvettes only have a range of 0.4-4 micrometers (400- 4000nm) and exhibit many ion absorption peaks. Therefore , quartz cuvettes are superior to glass cuvettes, providing more accurate and reliable analytical data.

It is possible for optical technicians to visually observe the difference in refractive index by hand or with the naked eye. They can accurately determine this based on experience by "comparing the refractive index with the naked eye." However, for individuals without experience, judgment errors are highly likely.

Methods:

• Method 1:

Quartz cuvettes typically have a  "Q" marking (quartz) , while glass cuvettes have a "G" marking (glass) . If the markings are not present ,  differentiation can be done by testing in the UV range where quartz has higher transmittance .

• Method 2:

Set the spectrophotometer wavelength to 250nm, zero it in the absence of any sample in the sample chamber, place the cuvette on one side of the sample chamber, and if the absorbance is less than 0.07Abs, it is quartz material ; otherwise, it is glass material.

Note: If the absorbance is slightly greater than 0.07Abs, it may still be quartz material, but the cuvette walls may not have been properly cleaned.

3..Application of quartz cuvette：

Quartz cuvette is used in UV spectroscopy, and hence, it is useful for studies on fluorescence and UV, VIS, and NIR absorbance. It is also useful in conducting measurements repeatedly without being hindered by cuvette deterioration. Quartz cuvettes also help in taking precise measurements in a variety of temperature settings and ensure repeatable results when assessing samples. Because quartz is a sturdy and hard material, handling and cleaning will not likely scratch or damage it. Since synthetic quartz doesn't exhibit background fluorescence, it can be used in deep UV applications. It is advised for fluorescent applications. Mechanical stressing of cuvettes used in circular dichroism experiments is never recommended because it can cause birefringence in the quartz and skew measurements.

4..Details of quartz cuvette:

• Material：silica quartz glass
• Technology of quartz cuvette：Melting process, high dimensional precision, corrosion resistance, no glue, no leakage
• Optical path length：10.20.50.100(mm)
• Applicable wavelength：190-2500nm
• Use of quartz cuvette：Suitable for visible and ultraviolet spectrophotometers

5..Advantages of quartz cuvette：

• 1.High transparent material: Imported German SCHOTT optical glass, no bubbles, no stripes. 
  
• 2.Fill volume: 3.5ml 
  
• 3.Technology process: Glue or Powder sintering process 
  
• 4.Two types: Standard type suitable for Neutral liquid; Acid and Alkali resistant type suitable for high precision experiments. 
  
• 5. Accommodates most sample volumes, and is compatible with most Spectrophotometers and Photometers 
  
• 6. Optical Windows: 2 or 4 windows 
  
• 7. Resistant to high temperature, most acids, bases, or organic solvents
• 8.Instrument: Can be used with most fluorometers or UV-Vis spectrometers (spectrometers)pectrometers)

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