Can we use an AR grade chemical for UV spectrometric analysis? Or is it a must to use a chemical that is specially designated (SpectrAR grade) for UV analysis?

To determine whether you can use an AR (Analytical Reagent) grade chemical for UV spectrometric analysis or if it is necessary to use a SpectrAR grade chemical, you should consider the following factors:

1. Purity: AR grade chemicals typically have a minimum purity level specified by the manufacturer. However, SpectrAR grade chemicals are specifically designed and tested to have higher purity, especially in the range of wavelengths used in UV analysis. This ensures that impurities do not interfere with the accuracy of the analysis.

2. Absorbance: UV spectrometric analysis relies on the measurement of the absorption of specific wavelengths of light by the chemical being analyzed. SpectrAR grade chemicals are carefully selected to have minimal absorbance in the UV range, allowing for more accurate determination of the analyte of interest. AR grade chemicals may contain impurities that can absorb UV light and interfere with the analysis.

3. Accuracy and precision: SpectrAR grade chemicals are produced and tested under strict quality control measures to ensure accurate and precise results in UV analysis. On the other hand, AR grade chemicals may have broader specifications and tolerances, which can introduce variability and uncertainty in the analysis.

In summary, while it is possible to use an AR grade chemical for UV spectrometric analysis, it is generally recommended to use a SpectrAR grade chemical to achieve the highest level of accuracy and reliability in your results. The choice ultimately depends on the specific requirements, sensitivity, and accuracy needed for your analysis. It is always advisable to consult the manufacturer's recommendations and specifications for the chemical being used.