QcUv/VIS^TM

QcUV/VIS is a utility program that compares two spectra and calculates a comparison statistic, the correlation coefficient. This value is useful in control charting materials differences as in a QC/QA lab or as an entry into the laboratory’s information management database. The data must be provided as ASCII text with space delimiters and should be between 200 and 800 nm -- most UV/VIS instruments can export the data in this format. The data is interpolated by the program to ensure that the correlation coefficient is calculated at the same wavenumbers. At this time the program can handle a spectrum from 200 nm to 800 nm with a 0.2 nm resolution or a smaller range at a higher resolution.

The unique feature of this program is its ability to calculate a cross-correlation. This method essentially calculates a correlation coefficient after shifting the data point by point. This is helpful in determining if the instrument is shifting peaks or (especially to researchers) if a functional group is shifted due to some reaction or some other material characteristic.

QcUV/VIS

• Calculates a linear correlation coefficient comparison statistics for any two spectra
• Data must be supplied as space delimited ASCII text from 200 nm to 800 nm
• The program can handle a spectrum from 200 nm to 800 nm with a resolution of 0.2 nm or a smaller range at a higher resolution
• Data is interpolated so the statistics are calculated at the same wavelength
• The correlation coefficient and file information can be output to a file for documentation.
• The data is in ASCII format so regions can be edited using any convenient text editor
• Calculates the Cross Correlation between two spectra
• The spectra as well as the cross correlation graph can be output to a printer
• Cross Correlation can provide information about

1. Peak shifts which may be due to instrument variance
2. Peak shifts due to different side groups
3. Harmonic peaks
• This data can be used for

1. QC/QA
2. Input to LIMS system
3. Research
• Is one in a growing family of Qc programs

1. QcIR
2. QcUV/VIS
3. Qc???
4. Stay-Tuned

Requirements: Windows 3.1, Windows 3.11, Windows95, or Windows NT

P/N A12128

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