Kitagawa - Formaldehyde

 710
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Specifications
Standard Range Extended Range
Measuring range 0.01-0.12 ppm 0.04-0.48 ppm
Sampling (flow) Rate 300mL/min
Sampling Volume 9000mL 3000mL
Corection Factor 1 4
Sampling Time 30min 10min
Detecting Limit 0.005 ppm (9000mL)
Colour Change Yellowish orange → Pink
Corrections for temperature/humidity Temperature correction is necessary
Operating Tempature 10 - 35°C
Shelf life 1 year (in the refrigerator, 0~10°C)
Accuracy (RSD,CV)
Relative Standard Deviation		 RSD-low:10% -- RSD-mid.:10% -- RSD-high:10%
Interference and cross sensativity
Substance(s) Interference ppm Coexistence
Ammonia The accuracy of readings is not affected. 0.5 Discolouration layer fades from the bottom of stained layer.
Amines // 0.5 //
Nitrogen dioxide Similar stain is produced. 0.5 Higher readings with indiscernible maximum end point of stained layer are given.
Acetaldehyde //   Higher readings are given.
Acetone //   //
Calibration gas generation Absorptiometric method
Datasource Kitagawa

 

GASTEC/Nextteq - Formaldehyde

 91PL
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The minimum scale value (0.01ppm) is not printed on the tube, but only the scale line is printed.
Specifications
Standard Range Extended Range
Measuring range 0.02-0.20 ppm 0.02-1.20 ppm
Sampling (flow) Rate 200mL/min
Sampling Volume 6000mL 2000mL
Corection Factor 1 6
Sampling Time 30min 10min
Detecting Limit 0.005 ppm
Colour Change Pale yellow → Pink
Corrections for temperature/humidity Temperature correction is necessary
Shelf life 1 year (in the refrigerator)
Accuracy CV=5-10%
(CV: Coefficient of variation = σ: standard deviation / mean value x 100)
Possibly coexisting substances and their interferences (NOTE)
Substance(s) Interference Colour change by itself
Ammonia max. 2 ppm No No
Nitrogen dioxide max. 1 ppm No No
Acetaldehyde   "+" error
(higher reading)		 produces pinkish discolouration
Acetone max. 0.3 ppm No Produces pinkish stain around tube opening (inlet)
Ethanol   No No
Ethyl acetate   No No
p-dichlorobenzene   No No
Toluene   No No

Scrubber 1 (black):removes acetone

Scrubber 2 (purple): Ammonia and nitrogen dioxide are removed. The presence of ammonia causes the purple scrubber 2 to turn yellow.

The presence of nitrogen dioxide causes scrubber 2 to turn a darker shade of purple
Calibration gas generation Diffusion tube method (analysis: by absorptiometry, acetylacetone method)
Datasource GASTEC - Manual - Data Sheet

 

GASTEC/Nextteq - Formaldehyde

 91TP
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This detector tube is only to be used with automatic gas sampler GSP-300FT-2.
The minimum scale value (0.01ppm) is not printed on the tube, but only the scale line is printed.
Specifications
Specifications
Standard Range Extended Range
Measuring range 0.01 - 0.50 ppm 0.50 - 1.75 ppm
Sampling (flow) Rate 100mL/min 50mL/min
Sampling Volume 1000mL 500mL
Correction Factor 1 3.5
Sampling Time 10min
Detecting Limit 0.005ppm (1000mL)
Colour Change Yellow → Pale orange
Corrections for temperature/humidity Temperature correction is necessary
Shelf life 1 year (in the refrigerator)
Accuracy CV=5-10%
(CV: Coefficient of variation = σ: standard deviation / mean value x 100)
Possibly coexisting substances and their interferences (NOTE)
Substance(s) Interference Colour change by itself
Acetaldehyde   + Pale orange
Acetone   + Pale orange
Ethanol 0.15% Yellow
Xylene 50ppm No No
Ammonia 1ppm Yellow
Nitrogen dioxide 1ppm No No
Calibration gas generation Permeation tube method
Datasource GASTEC - Manual - Data Sheet
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