Table 1

Values are given in PPB EGDN NG DNT TNT PETN RDX tetryl
SPME acetone SPME acetone SPME acetone SPME acetone SPME acetone SPME acetone SPME acetone
Demonstration Range
Water                            
Water                            
Soil                     >100 10–100    
Soil nd–1   nd–1 1–10 1–10 nd–1 1–10; nd–1     >100 interference >100  
Soil       nd–1   nd–1                
Soil       10–100   nd–1   1–10            
55-gallon drum             1–10   1–10 1–10   10–100    
Desk                   10–100        
Steel plate             nd–1   1–10   >100      
Pole                            
Ammo/coffee cans             1–10   1–10   >100      
Table 1–10   1–10 1–10 1–10   >100 >100 >100 >100 >100 >100    
Hand swab (1)             1–10 1–10   1–10        
Hand swab (2)             10–100              
Hand swab (3)                            
FBI Academy Samples
Negative control                            
Vending machine                            
Men's room                            
Lunch table                            
3 lunch tables                            
Mail/news box       nd–1                    
Post office boxes                            
Gun clearing boxes nd–1   1–10 10–100 nd–1                  
Gun tag and bag     nd–1 10–100                    
Gun vault counter     1–10 10–100                    

Table 1. Semiquantitative results from the field samples collected at the FBI Academy and the explosive range and analyzed using SPME with a gas chromatograph/electron capture detector and a gas chromatograph/mass spectrometer.