 |
||||||
 |
 |
 |
 |
|||
 |
||||||
|
Low Level Detection
|
|
| Trace Detection of Benzene in a Hydrocarbon Trace Detection of Sulfate in a Aqueous Solution Nitrate added to Aqueous Solution Trace Detection of Propylene Glycol in Water (click the picture for a high quality version) |
|
| Trace Detection of Benzene in a Hydrocarbon (top) |
|
| The spectral response from trace concentrations of benzene in isopropyl alcohol are displayed to the right, and the observed spectral responses were initially background corrected. A PI-200 spectrograph containing high performance lenses was used for the benzene monitroing. Lower detection limits, down to the 5 ppm range, could be easily obtained by using our high performance CCD, increasing laser power, or increasing the sample integration time. |  |
| The figure to the right displays the linear relationship between the benzene peak intensity and the benzene’s concentration in a hydrocarbon. The linear relationship has a correlation coefficient of 0.9987 |  |
| Trace Detection of Sulfate in a Aqueous Solution (top) |
|
|
The On-Line Sulfate Monitoring For Waterflood Projects link is a brief overview about using our technology to monitor sulfate concentrations for offshore oil waterflood projects. The spectral response from trace concentrations of sulfate in an aqueous solution are displayed to the right, and the observed spectral responses were initially background corrected. A PI-200-HP spectrograph containing high performance lenses and a deep depleted CCD was used for this study. The high performance instruments have ~ 10x more throughput when compared to the standard PI-200-L instrument. This study also utilized a higher power laser with ~ 3x more output power then our standard lasers. |
 |
|
Comparisons between the actual and predicted nitrate concentrations in an aqueous solution are displayed on the right. The standard deviation from the (actual – predicted) concentrations was 0.48 ppm and the linear relationship had a correlation coefficient of 0.9992. |
 |
| Nitrate added to Aqueous Solution (top) |
|
| The spectral response from trace concentrations of sulfate in an aqueous solution are displayed to the right, and the observed spectral responses were initially background corrected. A PI-200-HP spectrograph containing high performance lenses and a deep depleted CCD was used for this study. The change in peak intensity is easily distinguishable down to the single digit ppm range. |  |
|
Comparisons between the actual and predicted nitrate concentrations in an aqueous solution are displayed on the right. The standard deviation from the (actual – predicted) concentrations was 0.5 ppm and the linear relationship had a correlation coefficient of 0.999. |
 |
| Trace Detection of Propylene Glycol in Water (top) |
|
| The spectral response from trace concentrations of propylene glycol in an aqueous solution are displayed to the right, and the observed spectral responses were initially background corrected. A PI-200-HP spectrograph containing high performance lenses and a deep depleted CCD was used for this study. The change in peak intensity is easily distinguishable down to the double digit ppm range. |
 |
|
Comparisons between the actual and predicted propylene glycol concentrations in an aqueous solution are displayed on the right. The standard deviation from the (actual – predicted) concentrations was 0.0038 vol% and the linear relationship had a correlation coefficient of 0.999.
|
 |