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產(chǎn)品型號128SD
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廠商性質代理商
所 在 地上海市
更新時間:2024-11-27 14:58:02瀏覽次數(shù):1334次
聯(lián)系我時,請告知來自 化工儀器網(wǎng)室內空氣甲醛檢測管No.713 FORMALDEHYDE 0.01-0
氯乙烯CH2=CHCl氣體測毒管132SC VINYL CHLORID
氯乙烯CH2=CHCl氣體檢知管132SB VINYL CHLORID
丙烯腈檢測管128SD ACRYLONITRILE CH2=CHCN 0.2-20ppm
Tube 28SD
1. PERFORMANCE
1) Measuring range :1-20 ppm 0.5-10 ppm 0.25-5 ppm 0.2-4 ppm
Number of pump strokes 1(100mr) 2(200mr) 4(400mr) 5(500mr)
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :0.05ppm(500mr)
4) Shelf life :1 year (Necessary to store in refrigerated place ; 0~10℃)
5) Operating temperature :0~40℃
6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 1 pump stroke
8) Colour change :Yellow→Red
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:5% RSD-high:5%
3. CHEMICAL REACTION
By decomposing with an Oxidizer, Hydrogen cyanide is produced, Hydrogen cyanide reacts with Mercuric
chloride, then Hydrogen chloride is liberated and PH indicator is discoloured.
CH2=CHCN+CrO3+H2SO4→HCN
HCN+HgCI2→HCI
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
125
15
20
10
ppm
100ml
GAS To pump
(Reddish brown)
PRETREAT TUBE DETECTOR TUBE
128SD ACRYLONITRILE
Substance Interference ppm Coexistence
Butadiene
Less than
350 ppm Not affected.
Toluene
Less than
600 ppm 〃
Hexane
Less than
800 ppm 〃
Styrene
Less than
720 ppm 〃
(NOTE)
In case of 2 to 5 pump strokes can be used to detemine the lower concentration.
Following formula is available for actual concentration.
Actual concentration=Tmperature corrected value×
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 10℃ 20℃ 30℃ 40℃
(ppm) (32°F) (50°F) (68°F) (86°F) (104°F)
20 26 22.5 20 18 17
18 23 20 18 16.5 15.5
16 20.5 18 16 15 14
14 18 15.5 14 13 12
12 15.5 13.5 12 11 10.5
10 13 11 10 9.5 9
8 10.5 9 8 7.5 7
6 8 7 6 6 5.5
4 5.5 4.5 4 4 4
2 3 2 2 2 2
1 1.5 1 1 1 1
1
Number of strokes
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