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產(chǎn)品型號141SB
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所 在 地上海市
更新時間:2024-11-27 16:05:38瀏覽次數(shù):1487次
聯(lián)系我時,請告知來自 化工儀器網(wǎng)室內(nèi)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
二硫化碳CS2氣體檢知管141SB CARBON DISULPHIDE 0.8-50ppm
Tube 41SB
1. PERFORMANCE
1) Measuring range :2-50 ppm 0.8-20 ppm
Number of pump strokes 2(200ml) 4(400ml)
2) Sampling time :4 minutes/2 pump strokes
3) Detectable limit :0.3 ppm(400mr)
4) Shelf life :3 years(Necessary to store in a 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 2 pump strokes.
8) Colour change :Pink→Yellow
2. RELATIVE STANDARD DEVIATION
C.V-low:10% C.V.-mid.:10% C.V.-high:10%
3. CHEMICAL REACTION
Sulphur dioxide is produced by an Oxidizer.
By reacting between this Sulphur dioxide and alkali,
PH indicator is discoloured.
CS2+CrO3+H2SO4→SO2
SO2+2NaOH→Na2SO3+H2O
4. CALIBRATION OF THE TUBE
STANDARD GAS CYLINDER METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
5
2
10
20
30
40
50
ppm
200ml
GAS To pump
(White) (Yellow)
PRETREAT TUBE DETECTOR TUBE
141SB CARBON DISULPHIDE
Substance ppm Interference ppm Coexistence
Sulphur dioxideFIG.1 15 Similar stain is produced. Higher readings are given.
Hydrogen sulphiFdIeG.2 100 〃120 〃
Chlorine Pale pink stain is produced. 〃
(NOTE)
In case of 4 pump strokes, following formula is available for the actual concentration.
Actual concentration = 2/5×Temperature corrected value
0
10
20
30
40
50
5
Sulphur dioxide〔ppm〕?
FIG.1 Influence of Sulphur dioxide
Carbon dioxide
indicating value 〔ppm〕
20 40
Coexistence
Interference
0
10
20
30
40
50
5
Hydrogen sulphide〔ppm〕?
FIG.2 Influence of Hydrogen sulphide
Carbon dioxide
indicating value 〔ppm〕
100 200
Coexistence
Interference
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 10℃ 20℃ 30℃ 40℃
(ppm) (32°F) (50°F) (68°F) (86°F) (104°F)
50 72 59 50 43 38
45 65 54 45 39 34
40 58 48 40 34 30
35 51 42 35 30 26
30 44 36 30 26 22
25 37 30 25 21 18
20 31 25 20 17 14
15 24 19 15 13 10
10 16 12 10 8 7
5 9 7 5 4 3
2 3 3 2 2 1
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