These are solid-phase extraction columns for pretreatment for analysis of aldehydes in the atmospheric environment. Presep®-C DNPH uses a filler of silica gel coated with 2,4-dinytrophenyl hydrazine and is suitable for collection and derivatization of aldehydes.
Presep®-C DNPH (Short) with improved base material and filter enables sampling at a high flow velocity.
Presep®-C Ozone Scrubber is a cartridge column filled with purified potassium iodide. It is suitable for collection of aldehydes and removal of ozone which interferes with DNPH derivatization.

- Presep®-C DNPH (Short) Presep®-C DNPH
Material Crushed silica gel Crushed silica gel
Particle size: 150 to 450 μ m Particle size: 75 to 150 μ m
Pore size: 7.0 nm Pore size: 7.0 nm
Specific surface area: 450 cm2/g Specific surface area: 450 cm2/g
Filler Approx. 0.4 g/cartridge Approx. 0.8 g/cartridge
Quantity of DNPH Approx. 0.9 mg/cartridge Approx. 1.8 mg/cartridge
Column size Overall length: 3.8 cm Max. width: 1.9 cm in diam Filled part: 1.0 in diam x 0.8 cm Overall length: 5.0 cm Max. width: 1.9 cm in diam Filled part: 1.0 in diam x 1.6 cm
Sample loading Approx. 75 μ g (as formaldehyde) Approx. 150 μ g (as formaldehyde)

Presep®-C DNPH Series
1 Low blank
(Reduction of contamination of background of formaldehyde, acetaldehyde and acetone)
2 Convenient individual packaging
3 Remarkably small lot-to-lot difference
Presep®-C DNPH (Short)
1 The resistance in the column during air flow is low,
 
and it enables sampling at a high flow velocity.
2 It is suitable for collection of air in room (in conformity with the
methods specified by the Ministry of Health, Labour and Welfare).


Column:Presep®-C DNPH
      Presep®-C Ozone Scrubber
     
(When the measurement is affected by ozone, the columns
      are used in the connected state.)
    ↓
Collection: 30 L 0.5 L/min
   ↓
Elution:Preparation to 5 mL of acetonitrile
When Presep®-C Ozone Scrubber is connected, the target
component will be extracted with acetonitrile after it is removed.
   ↓
HPLC analysis

Column :Wakopak® Wakosil DNPH-II (4.6 mm x 150 mm)
Eluent :A:Wakosil DNPH-II Eluent A
     B:Wakosil DNPH-II Eluent B
     0-10 min.B conc. 0-100% 10-16 min.B conc. 100%
Flow Rate :1.0 mL/min. at 35°C
Detection :UV 360 nm
Injection vol.:10 μL


Description Wako Cat. No. (Pkg. Size)
Presep®-C DNPH(Short) 291-43951 ( 20 units )
Presep®-C DNPH 290-34251 ( 20 units )
Presep®-C Ozone Scrubber 293-40351 ( 20 units )

HPLC columns
Description Wako Cat. No. (Pkg. Size)
Wakopak® Wakosil DNPH 4.6mm×250mm ( D ) 238-59411 ( 1 unit )
( W ) 234-59413 ( 1 unit )
Wakopak® Wakosil DNPH-Ⅱ 4.6mm×150mm ( D ) 231-61731 ( 1 unit )
( W ) 237-61733 ( 1 unit )

Special eluents
Description Wako Cat. No. (Pkg. Size)
Wakosil® DNPH Eluent A 233-01611 ( 1 L )
Wakosil® DNPH Eluent B 230-01621 ( 1 L )
Wakosil® DNPH-Ⅱ Eluent A 236-02181 ( 1 L )
Wakosil® DNPH-Ⅱ Eluent B 233-02191 ( 1 L )
Acetonitrile(for analysis of aldehydes) 017-17743 ( 100 mL )
011-17741 ( 200 mL )




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