Sorbent tubes

Sorbent tube standards preparation by the syringe injection technique... 

Diethyl sulphate and dimethyl sulphate Lab method using Tenax sorbent tube, thermal desorption and gas chromatography with mass spectrometry 89... 

Dioctyl phthalate Lab method using Tenax sorbent tubes, solvent desorption and gas chromatography 32... 

Hydrocarbons (mixed C3-C,q) Lab method using pumped porous polymer and carbon sorbent tubes, thermal desorption and gas chromatography 60... 

Pesticides in air and on surfaces Pumped filters/sorbent tubes with gas chromatography 94... 

Breakthrough A condition that exists when the backup section of a sorbent tube is found to contain 20-25 percent of the total amount of contaminant captured in the front section. 

Sorbent tubes Small glass tubes that contain sampling media such as silica gel or activated charcoal. 

Coyne LB, Warren JS, Cerbus CS. 1987. An evaluation of a new desorption technique for air sampling sorbent tubes. Am Ind Hyg Assoc J 48 668-670. 

Air sampling pumps should be calibrated and the planned flow rate should be set prior to using them in the study. The calibration of these air pumps should be accomplished with an air sorbent tube in place, which is similar to the type to be used in the study. Records on the calibration of the air pumps should be kept in the field research notebook for the study. 

Many types of matrices have been used in the past to measure the field stability of the test substance. Cotton gloves, cellulose patches, face wipe handkerchiefs and/or gauze face wipe matrices, long underwear (inner dosimeters), pants, shirts, coveralls (outer dosimeters), sorbent tubes, urine, and other matrices are common matrices that have been used for this purpose. 

Air sorbent tubes, air filters, and OHSA (Occupational Safety and Health Administration) vertical sampler (OVS) air tubes should be fortified using a microsyringe with the appropriate amount of active ingredient. A 25-pL syringe is optimum for... 

Occupational air (NIOSH Method 7905) Sample collection on Tenax sorbent tube GC/FPD(P) 0.005 pg/sample 94 NIOSH 1989a... 

Filter through a 0.5-pm Zefluor absorb on a solid sorbent tube containing coconut shell charcoal desorb with ammonia hydroxide and hydrogen peroxide dilute. 

Chemical measurements can be performed during developing stages of fire using direct reading measurements and sampling techniques like sorbent tubes. 

Drinking Purge with inert gas trap on Water sorbent tube desorb thermally... 

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