成人毛片无码一区二区三区,亚洲精品成人无码中文毛片,亚洲国产精品尤物yw在线观看,人妻互换精品一区二区

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>190U乙烷纖維素溶劑醋酸鹽C2H5OC2H4OCOCH3 190U 5-150ppm

乙烷纖維素溶劑醋酸鹽C2H5OC2H4OCOCH3 190U 5-150ppm

簡要描述:

乙烷纖維素溶劑醋酸鹽C2H5OC2H4OCOCH3 190U ETHYL CELLOSOLVE ACETATE (+) 5-150ppm,操作簡便:用檢測管測定氣體濃度時(shí),不需要同化學(xué)分析那樣加用多種化學(xué)試劑和使用各種玻璃儀器,一般也無需進(jìn)行計(jì)算。也無需儀器分析那樣做好復(fù)雜的測前準(zhǔn)備。工作步驟僅有采樣和結(jié)果顯示兩步,而這兩步又幾乎是同時(shí)進(jìn)行的,這就為專業(yè)分析人員提供了極大方便,即使對(duì)沒有分析基礎(chǔ)知識(shí)的人,如現(xiàn)場工程技術(shù)或操作人員,只要參照使用說明或?qū)ζ渖约又笇?dǎo)就可以應(yīng)用。

更新時(shí)間:2025-01-15

在線留言
乙烷纖維素溶劑醋酸鹽C2H5OC2H4OCOCH3 190U 5-150ppm

乙烷纖維素溶劑醋酸鹽C2H5OC2H4OCOCH3 190U 5-150ppm

1. PERFORMANCE
1) Measuring range :5-100 ppm
Number of pump strokes 3(300ml)
2) Sampling time :4.5 minutes/3 pump strokes
3) Detectable limit :2 ppm
4) Shelf life :2 years
5) Operating temperature :0~40℃
6) Temperature compensation:Necessary(See"TEMPERATURE CORRECTION TABLE")
7) Reading :Graduations printed on the tube are calibrated by Ethyl cellosolve at 3 pump strokes
and 1-Butanol concentration is determined by using a conversion chart.
8) Colour change :Yellow→Pale blue
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:10% RSD-high:5%
3. CHEMICAL REACTION
Chromium oxide is reduced.
CH3CH2CH2CH2OH+Cr6++H2SO4→Cr3+
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
50
20
100
150
200
300
400
500
5
300ml
ppm
GAS To pump
DEHUMIDIFIER
(White)
Tube No.
1-BUTANOL
Substance ppm Interference Coexistence
Alcohols FIG.1 Similar stain is produced. Higher readings are given.
Toluene 200 Whole reagent is changed to Pale blue. 〃
Hexane 1,000 The accuracy of readings is not affected. The accuracy of readings is not affected.
Trichloroethylene 1,000 〃〃
Ethyl acetate FIG.2 1,000 〃〃
0
100
50
Ethanol〔ppm〕?
FIG.1 Influence of Ethanol
1-Butanol indicating value 〔ppm〕
50 100
Coexistence
Interference
0
100
50
Ethyl acetate〔ppm〕?
FIG.2 Influence of Ethyl acetate
1-Butanol indicating value 〔ppm〕
500 1000
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 0℃ 10℃ 20℃ 30℃ 40℃
(ppm) (32°F) (50°F) (68°F) (86°F) (104°F)
100 - - 100 85 77
80 - - 80 70 63
60 - 80 60 53 50
40 75 50 40 35 33
20 30 23 20 18 16
10 13 11 10 9 8
5 5 5 5 5 5
1-Butanol(ppm)?
90U Tube reading(ppm)

欧美日韩亚洲国产精品| 风流老熟女一区二区三区| 中文字幕日韩一区二区三区不卡| 国产成人涩涩涩视频在线观看| 女学生处破外女出血视频| 国精品无码人妻一区二区三区 | 果冻传媒剧国产剧在线看| 免费看美女视频的软件| 办公室撕开奶罩揉吮奶头H文视频| 上司人妻互换HD无码中文 | 国产精华推荐2021| 日日噜噜夜夜狠狠久久丁香五月| 一区二区狠狠色丁香久久婷婷| 少妇下蹲露大唇无遮挡| 日本黄a级a片国产免费| 国产免费av片在线观看| 少妇又色又紧又爽又刺激视频| 日韩精品视频一区二区三区| av无码国产精品午夜a片| 精品国产av无码一区二区三区| 亚洲色成人中文字幕网站| 国产精品9999久久久久仙踪林| 久久午夜无码鲁丝片| 午夜夫妻试看120国产| 国产色视频网免费| 无码一区二区三区| 国产精品18久久久久久麻辣 | 解开人妻的裙子猛烈进入| 韩国精品福利一区二区三区| 善良的嫂子在线观看| 最近中文字幕高清字幕| 久久精品国产亚洲av蜜臀| 国产古装又黄a片在线观看| 亚洲国产精品无码久久一区二区 | 这里只有精品在线视频| 天堂av无码大芭蕉伊人av不卡| 又粗又黄又爽视频免费看| 真人作爱90分钟免费看视频| 亚洲av成人无码网天堂| 电梯里吸乳挺进我的身体视频| 亚洲av无码国产精品麻豆天美|