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                  | LANWATSU PASSIVE SAMPLERS FOR SO2, NO2, NOx, NH2, O3 |  
                  | Code | Items |  | Price/USD |  
                  | PS-01 | Passive sampler for  NH3 (PTFE screen) |  | 16.90 |  
                  | PS-02 | Passive sampler for NO2 (PTFE screen) | 16.90 |  
                  | PS-03 | Passive sampler for NO2 (SS screen) | 12.00 |  
                  | PS-04 | Passive sampler for O3 (PTFE screen) | 17.40 |  
                  | PS-05 | Passive sampler for O3 (SS screen) | 13.20 |  
                  | PS-06 | Passive sampler for SO2 (PTFE screen) . | 16.90 |  
                  | PS-07 | Passive sampler for NOx (PTFE screen) . | 16.40 |  
                  | * A preloaded passive sampler & a tube for  extraction |  
                  | PRE-COATED COLLECTION PADS |  
                  | Code | Items |  | Price/USD |  
                  | IF-01 | Pre-coated collection pad for NH3.   20 pads. |  | 38.5 |  
                  | IF-02 | Pre-coated collection pad for  NO2. 20 pads. | 38.5 |  
                  | IF-03 | Pre-coated collection pad for  NOx. 20 pads. | 43.3 |  
                  | IF-04 | Pre-coated collection pad for  O3. 20 pads. | 48.0 |  
                  | IF-05 | Pre-coated collection pad for  SO2. 20 pads. | 38.5 |  
                  | STANDARDS |  
                  | Code | Items | Pollutant | Price/USD |  
                  | ST-01 | 1000 ppm SO4-2 standard. 100 ml. | SO2 | 64.42 |  
                  | ST-02 | 1000 ppm NO2- standard. 100 ml. | NO2, NOx | 64.42 |  
                  | ST-03 | 1000 ppm   NO3- standard. 100 ml. | O3 | 64.42 |  
                  | ST-04 | 1000 ppm   NH4+ standard. 100 ml. | NH3 | 64.42 |  
                  | ST-05 | 1000 ppm SO4-2, NO2-, NO3- standard. 100 ml. | SO2, NO2, NOx,O3 | 98.85 |  
                  | SOLVENT FOR EXTRACTION |  
                  | Code | Items | Pollutant | Price/USD |  
                  | DM-01 | Saltzman reagent, Box of 50 tubes. | NO2, NOx | 25.00 |  
                  | ACCESSORIES |  
                  | Code | Items |  | Price/USD |  
                  | TEF-01 | PTFE screen. 1 piece. |  | 3.85 |  
                  | TEF-02 | PTFE screen. Box of 10. | 33.65 |  
                  | TEF-03 | PTFE screen. Box of 50. | 144.00 |  
                  | SS-01 | SS screen. Box of 10. |  | 4.8 |  
                  | SS-02 | SS screen. Box of 100. | 14.45 |  
                  | MC-01 | Thermoplastic polyolephin membrane. Pack of 100. |  | 2.99 |  
                  |  | Storage containers, Cases, Shelters |  |  |  |  |