Chapter 3 Peak Detection and Labeling
• For spectral data, determines the peak boundaries by
| one of two means: |
| • If the Noise Threshold is greater than zero, the |
| software scans from the valley regions toward the |
| apex region using the number of data points |
| defined by the Filter Width. If the difference |
| between two consecutive filtered regions is |
| greater than the Noise Threshold, the midpoint of |
| the filter region closest to the apex is used as the |
| peak bound. |
| • If the Noise Threshold is zero, the software scans |
| the valley regions for the minimum points to |
| determine the peak bounds. |
| For chromatogram data, determines the peak boundaries |
| by: |
3 | • Determining the Noise Threshold by performing an |
automatic | |
| peak in the chromatogram and using 75 percent of |
| the noise value determined as the threshold. |
| • Scanning from the valley regions toward the apex |
| |
| region using the number of data points defined by |
| the Filter Width. If the difference between two |
| consecutive filtered regions is greater than the |
| Noise Threshold, the midpoint of the filter region |
| closest to the apex is used as the peak bound. |
| • Compares the area of the new peak to the %Max Peak |
| Area and the Minimum Area. A Minimum Area of 2 is |
| used for chromatogram data. If the new peak is within the |
| specified area settings, the peak is added to the peak list. |