精品国产天线2019,色综合久久无码五十路人妻,亚洲熟悉妇女XXX妇女AV,亚洲H在线播放在线观看H

產(chǎn)品列表PRODUCTS LIST

首頁>產(chǎn)品中心>日本光明北川式氣體檢測管>氣體快速檢測管>176S甲基碘CH3I氣體檢測管176S METHYL IODIDE 2-40ppm

甲基碘CH3I氣體檢測管176S METHYL IODIDE 2-40ppm

簡要描述:

甲基碘CH3I氣體檢測管176S METHYL IODIDE 2-40ppm,Measuring range :4-40 ppm 2-20 ppm,碘化鉀/碘甲烷氣體檢測管,國家標準,中國職業(yè)接觸限值(GBZ 2—2002)Z高容許濃度(MAC)時間加權(quán)平均容許濃度(TWA)10 mg/m3,短時間接觸容許濃度(S)25 mg/m3,www.yd666.com

更新時間:2025-03-11

在線留言
甲基碘CH3I氣體檢測管176S METHYL IODIDE 2-40ppm

甲基碘CH3I氣體檢測管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

精品夜夜爽欧美毛片视频| 人妻夜夜爽天天爽爽一区| 国产精品一区| 红杏永久免费视频入口| a片免费视频在线观看| 最近中文字幕在线看免费完整版| 精品久久久久久国产| 久久久久国产精品免费免费搜索| 996久久国产精品线观看| 国产老熟女视频一区二区| 国产精品一区二区久久乐下载| 国产中老年妇女精品| 我的初次内射欧美成人影视| 精品亚洲一区二区三区在线观看 | 18款禁用免费安装的软件app| 亚洲日韩av在线观看| 欧美最猛性XXXXXX| 久久久人人人婷婷色东京热| 亚洲欧美日本| 国产丝袜美女一区二区三区| 99久久久无码国产AAA精品| 久久精品AⅤ无码中文字字幕| 2022国产成人精品视频人| 观看欧美大片毛大片| 成年美女黄网站色大片免费看| 97精品久久久久中文字幕| gogogo日本免费观看视频| 亚洲午夜久久久无码精品网红A片| 国产精品美女久久久网av| 亚洲无MATE20PRO| 最近2019年中文字幕完整版免费| 日韩毛片人妻久久蜜桃传媒| 欧美xxxx黑人又粗又长精品 | 成全视频在线观看免费| 免费看大片软件| 久久亚洲美女精品国产精品 | 亚洲VA在线VA天堂VA无码| 国产处破苞无码精品| 国产精品99亚发布| 欧美亚洲日韩国产区一| 国产又爽又粗又猛的视频|