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首页>产品中心>日本光明北川式气体检测管>气体快速检测管>176S甲基碘CH3I气体检测管176S METHYL IODIDE 2-40ppm

甲基碘CH3I气体检测管176S METHYL IODIDE 2-40ppm

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甲基碘CH3I气体检测管176S METHYL IODIDE 2-40ppm,Measuring range :4-40 ppm 2-20 ppm,碘化钾/碘甲烷气体检测管,国家标准,中国职业接触限值(GBZ 2—2002)Z高容许浓度(MAC)时间加权平均容许浓度(TWA)10 mg/m3,短时间接触容许浓度(S)25 mg/m3,www.yd666.com

更新时间:2017-07-18

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甲基碘CH3I气体检测管176S METHYL IODIDE 2-40ppm

甲基碘CH3I气体检测管176S METHYL IODIDE 2-40ppm

Tube 76S

1. PERFORMANCE
1) Measuring range :4-40 ppm 2-20 ppm
Number of pump strokes 2(200ml) 4(400ml)
2) Sampling time :4 minutes/2 pump strokes
3) Detectable limit :0.5 ppm(400ml)
4) Shelf life :8 months
5) Operating temperature :10~40℃
6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 2 pump strokes
8) Colour change :White→Grey
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:10% RSD-high:10%
3. CHEMICAL REACTION
Iodine pentoxide is reduced.
CH3I+I2O5+H2SO4→I2+CO2+H2O
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
40
35
30
25
20
15
10
468
ppm
GAS To pump
(Yellow)
PRETREAT TUBE DETECTOR TUBE
176S METHYL IODIDE
Substance Interference ppm Coexistence
Acetone Similar stain is produced. 700 Higher readings are given.
Hydrogen sulphide FIG.1 〃7 〃
Hexane FIG.2 〃500 〃
Benzene 2 Lower readings are given.
Toluene 2 〃
Xylene 2 〃
Halogenated hydrocarbons Double-layer stain is produced and
accurate readings are affected.
0
30
20
Hydrogen sulphide〔ppm〕�
FIG.1 Influence of Hydrogen sulphide
Methyl iodide
indicating value 〔ppm〕
510 15 20 25 3035
10
0
20
Hexane〔ppm〕�
FIG.2 Influence of Hexane
Methyl iodide
indicating value 〔ppm〕
500 1000 1500 2000 2500
10
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 10℃ 20℃ 30℃ 40℃
(ppm) (32°F) (50°F) (68°F) (86°F) (104°F)
40 - - 40 46 52
35 - 52 35 42 49
30 54 39 30 37 44
25 37 27 25 25 23
20 30 22 20 23 30
15 24 17 15 17 24
10 17 11 10 12 17
5 10 5 5 5 10
(NOTE)
In case of 4 pump strokes, following formula is available for the actual concentration.
Actual concentration = 1/2 × Tmperature corrected value

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