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Drager Short Term Detection Tubes - Phosphoric Acid Esters 0.05/a (Pk of 10)

These tubes are designed for spot-measurements and must be used with the Drager Accuro Gas Detection Pump. Buy now from Frontline Safety.

£179.75 inc VAT

£149.79

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Product description

Drager Short Term Detection Tubes, Phosphoric Acid Esters 0.05/a: Detects a range of substances incl. Disulphoton, Fenthion , Phosphoric Acid Ester.

Note: This product has a shelf life of 2 years and comes in a pack of 10 tubes.

Specification

Application Range
Standard Measuring Range	0.05 ppm Dichlorvos
Number of Strokes (n)	8
Measuring Time	approx. 5 min
Standard Deviation	± 30 %
Colour Change	yellow to red

Ambient Operating Conditions
Temperature	10 to 40 °C
Absolute Humidity	3 to 18 mg H2O / L

Principle of reaction
a) (CH3O)2PO2-CH=CCI2 + Cholinesterase inactive enzyme b) Butyrylcholine iodide + H2O Butyric acid c) Butyric acid + Phenol red yellow reaction product If phosphoric acid esters are present the enzyme is inactivated and butyric acid will not form, thus the weak alkali solution colors the indicating layer red and must be stable for 1min. If the enzyme remains active, phosphoric acid esters are not present, and the indicating layer remains yellow because of butyric acid formation.

Cross Sensitivity
Other phosphoric acid esters than dichlorvos are also indicated, but with different sensitivities.

Additional Information
After performing the required 10 pump strokes the reagent ampoule must be broken and the liquid transferred to the enzyme layer by gently tapping the side of the tube. The substrate layer must not become wet After waiting one (1) minute the liquid must be carefully drawn up to the marking line using the pump. Wait another minute before drawing the liquid onto the indication layer using the pump.transferred completely onto the indication layer.