Organics

There is a wide variety of techniques and methods for organics.  Depending on DQO, area of interest, whether conditions, process conditions that emit, and the target compounds(s) themselves all dictate the sensibility of one sample collection technique over another.

Discreet Samples

 A first screen technique we like to recommend is grab or integrated canister sampling.  This is a cost- effective first step that provides valuable information if done correctly.  When we say done correctly, we are not saying it’s difficult, it’s not, it’s very easy, you just must be systematic in the approach.  The good news is we can provide the training. We have placed sampling procedures in the “Industrial Hygiene” tab on the right side of the page. We use Restek or Silco passivated 6L steel canister equipped with a flow controller or use the Andersen controller shown below.  Canisters are not all equal, although they look the same on the outside, their passivation coating is what makes the big difference in their performance.   The flow controller can be set for specific periods of time for sampling events and that is determined at the sample planning stage. 

  

 

 Figure – 6L Canister sampling controllerCan_Cleaner_1.jpg
   

 

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Figure – 6L canister with sampling flow controller (left) passivated collection tubes (right)

                                            

Real-Time Monitoring

Single point measurement       

The use of optical techniques to identify and quantify atmospheric pollutants have been the subject of great interest within a variety of industries. The ability to analyze ambient air in a continuous, real-time manner is an appealing factor in DQO, large areas of interest, changing weather conditions that impact target compounds, process conditions that are changing, batch or continuous, and the target compounds(s) themselves. This technique has increasing acceptance of spectroscopic methods by both state and federal regulatory agencies and in some cases, it’s the only way. Sensitivities for ambient-level

(typically, in the single-digit ppb range, or sometimes lower) detection of common hazardous air pollutants (HAPs) can be achieved.  Compounds such as formaldehyde, HCl, HF and NH3 or criteria pollutants, including CH4, CO, SOx or NOx compounds, are common in many laser-based techniques. There are several approaches our expert can discuss with you in regard to a cost-effective project to obtain the data quality objectives and your needs.

 

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Open Path averages over set distance

Open Path FTIR is the same principle detection as we use in extractive FTIR, the exception is mirror array placement and optical path length.  It’s not uncommon to achieve 850 meters of path, up and back, with the systems we use.  Unlike LIDAR, which can measure one chemical or the presence of chemicals containing a common chemical bond at specific distances along the line of site, FTIR provides averages over set distances. Tunable diode lasers have similar detection limits as FTIR but are restricted to detecting chemicals that respond to the small frequency range in which they operate.  This is a good choice when dealing with large areas of potential release, ponds, vehicle spills, train derailments, fenceline studies etc.

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1560 W. Bay Area Blvd. #200, Friendswood, TX 77546
Office 1-(844)3-GOLDENFax 281.984.7137