免费无码成人AV电影在线播放,精品露脸国产偷人在视频,国产成人免费视频,少妇高潮a片无套内谢麻豆传

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>237S醋酸乙烯酯CH3CO2CH=CH2氣體檢測管237S VINYL ACETATE 5-120ppm

醋酸乙烯酯CH3CO2CH=CH2氣體檢測管237S VINYL ACETATE 5-120ppm

簡要描述:

醋酸乙烯酯CH3CO2CH=CH2氣體檢測管237S VINYL ACETATE 5-120ppm,別 名 乙酸乙烯;乙烯基乙酸酯;醋酸乙烯酯,英文名稱 vinyl acetate;ethenyl ethanoate,健康危害:本品對眼睛、皮膚、粘膜和上呼吸道有刺激性。長時間接觸有麻醉作用。產(chǎn)品別名 乙酸乙烯酯;醋酸乙烯;VAC,產(chǎn)品英文名 Vinyl acetate;Vinyl acetic ester;VA,結(jié)構(gòu)式為CH3COOCH=CH2

更新時間:2025-01-16

在線留言
醋酸乙烯酯CH3CO2CH=CH2氣體檢測管237S VINYL ACETATE 5-120ppm

醋酸乙烯酯CH3CO2CH=CH2氣體檢測管237S VINYL ACETATE 5-120ppm

Tube No.237S

1. PERFORMANCE
1) Measuring range :10-120 ppm 5-60 ppm
Number of pump strokes 1(100ml) 2(200ml)
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :1 ppm(200ml)
4) Shelf life :2 years
5) Operating temperature :0~40℃
6) Reading :Direct reading from the scale calibrated by 1 pump stroke
7) Colour change :Yellow→Pale blue
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:5% RSD-high:5%
3. CHEMICAL REACTION
Chromium oxide is reduced.
CH3CO2CH=CH2+Cr6++H2SO4→Cr3+
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
100
ml
ppm
GAS To pump
DEHUMIDIFIER
(White)
120
100
80
60
40
20
10
237S VINYL ACETATE
Substance Interference ppm Coexistence
Acetic acid The accuracy of readings is not
affected.
Ethylene 150 The top of discoloured layer becomes
unclear.
Alcohols Similar stain is produced. Higher readings are given.
Ethers 〃〃
A(mlipohrea ttihca hny Cdr3o)carbons tWo hBorloew lany. er is discoloured 〃
Aromatic hydrocarbons 〃〃
Halogenated hydrocarbons 〃〃
Esters 〃〃
Ketones 〃〃
(NOTE)
In case of 2 pump strokes, following formula is available for the actual concentration.
Actual concentration=1/2×Reading value

久久久久久久久精品无码中文字幕 | 熟妇人妻中文av无码| 日韩精品a片一区二区三区| 国产精品久久久久久久久无码| 免费观看完整视频app| 高清无码中文字幕在线观看视频| 日韩人妻无码中文字幕视频| 国产精品久久久久AAAA| 无码人妻精品一区二区三区99| 欧美丰满熟妇XXXX性| 亚洲精品无码mv在线观看 | 色欲无码国产喷水av精品| 99久久亚洲精品无码毛片| 少妇被粗大的猛烈进出a片久久久| 久久av无码精品人妻系列| 漂亮人妻被中出中文字幕久久| av毛片无码不卡中文字幕| 久久久久99精品成人片a片试看| 欧美人妻一区黄a片| 欧美激情第1页| 荡女妇边被C边呻吟久久网| 绿巨人WWW视频在线观看高清| 亚洲AV无码专区在线观看成人| А√天堂中文在线资源库免费观看| japanese极品丰满少妇| 最近2019中文字幕大全视频1 | 日韩加勒比一本无码精品 | 久久久国产精华液| 中文字幕乱码人妻无码久久 | 欧美直播APP| 国产精品成人无码免费| 国产精品人妻一码二码| 亚洲成a人无码亚洲成a无码| 亚洲AV无码久久久久久精品同性| 无码一区二区三区| 久久性爱视频| 亚洲精品成人片在线观看| 无码欧美熟妇人妻影院欧美潘金莲| 亚洲AV无码乱码在线观看四虎| 国产精品久久久久无码av| 亚洲精品午夜国产va久久成人|