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Nextteq Detector Tubes

SCALE

Short Term

NEXTTEQ

Pump

GAS

1. PERFORMANCE

1) Measuring range : 20-1,000 ppm

Number of pump strokes : 1 (100mL)

2) Sampling time : 1.5 minutes / 1 pump stroke

3) Detectable limit : -

4) Shelf life : 2 years

5) Operating temperature : 15~25°C

6) Reading : Graduations printed on the tube are calibrated by Methyl Ethyl Ketone at 1 pump

stroke and Diisobutyl Ketone concentration is determined by using a conversion

chart

at 1 pump stroke

7) Color change : Yellow→Pale blue

2. RELATIVE STANDARD DEVIATION

RSD-low: 10% RSD-mid.: 10% RSD-high: 10%

3. CHEMICAL REACTION

Chromium Oxide is reduced.

[(CH3) 2CHCH2]2CO+Cr6++H2SO4→Cr3+

4. CALIBRATION OF THE TUBE

GAS CHROMATOGRAPHY

5. INTERFERENCE AND CROSS SENSITIVITY

Substance Interference Coexistence

Alcohols Similar or Brown stain is produced. Higher readings are given.

Esters " "

Ketones " "

Aromatic Hydrocarbons " "

Halogenated Hydrocarbons

Whole reagent is changed to Brown,

but if the maximum end point of the

Pale blue stain is discernable, the

accuracy of reading is not affected.

Aliphatic Hydrocarbons "

*METHYL ETHYL KETONE TUBE

Diisobutyl Ketone Concentration(ppm)

NX184L tube reading(ppm)

20 50 100 200 500 1000

2050100 200 500 1000 1500

(100mL)

DIISOBUTYL KETONE

Tube No. NX184L*

(CH3CH(CH3)CH2)2CO