Formaldehyde Sampling Tubes

• High capacity
  
  
• Low background
  
  
• Meet OSHA, NIOSH, ASTM and EPA specifications
  
  
• For TWA and STEL sampling
  
  
• Available with ozone scrubber
  
  
• Environmental and industrial hygiene applications

SKC formaldehyde sample tube Cat. No. 226-119 is 6-mm OD x 110-mm long and contains a 300-mg front sorbent section and a 150-mg backup sorbent section. The sorbent is silica gel with ultra-low background coated with 2,4-dinitrophenylhydrazine (DNPH) as specified in EPA TO-11A, EPA IP6A, and ASTM D 5197. SKC tube Cat. No. 226- 120 is 8-mm OD x 115-mm long and contains the same coated sorbent and backup sections. However, it also contains a section of potassium iodide that acts as an ozone scrubber as suggested in EPA IP6A and ASTM D 5197.

When sampling for formaldehyde in the presence of ozone, use SKC tube Cat. No. 226-120 with an ozone scrubber section. This built-in section removes ozone from the sample stream eliminating background interference during analysis.

Performance
Formaldehyde and other aldehydes react with DNPH to form stable hydrazones, which are extracted from the silica gel and analyzed by liquid chromatography. Cartridges previously specified in EPA TO-11 have a high pressure drop with a recommended flow rate of 200 ml/min making them incompatible with many personal sampling pumps. The SKC tubes, with their low pressure drop, can be used with standard personal sampling pumps up to 1 L/min. The cartridges lack a backup section to detect sample breakthrough, while the SKC tubes have a 150-mg backup sorbent section. The SKC tubes also have a greater capacity than the previously specified cartridges. The formaldehyde background of the SKC tubes meet EPA TO-11A requirements.

Indoor Air Quality Sampling
SKC formaldehyde tubes meet the specifications of NIOSH Methods 2541 and 2539 and OSHA Method 52 for workplace formaldehyde sampling.

SKC formaldehyde tube Cat. No. 226-119 meets NIOSH Method 2016 specifications for workplace sampling. Its high capacity, ultra-low background levels, and backup section give this tube an edge over traditional packed cartridges. This tube is suitable for both personal workplace and ambient monitoring.

Ordering Information           Online Ordering

* This tube is not suitable for the quantification of acrolein in air. Freezer storage required

Formaldehyde Sampling Tubes Product Data Bulletin (PDF)

Sorbent Tube 226-119 Operating Instructions/Certificate of Quality

Sorbent Tube 226-120 Operating Instructions/Certificate of Quality

EPA IP6A Method Update: Determination Of Formaldehyde And Other Aldehydes In Indoor Air