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)

99久久国产综合精品成人影院| 白领人妻的屈辱交易| WWW亚洲精品少妇裸乳一区二区| 最近最新手机中文大全4| 精品久久久久久综合日本| 欧美日激情日韩精品嗯| 国产裸体美女永久免费无遮挡| 欧洲亚洲国产精华液| 他揉捏她两乳不停呻吟人妻| 亚洲av无码一区二区乱子伦as | 国产仑乱无码内谢| 免费追剧大全电视剧网站影视大全| 无码欧精品亚洲日韩一区| 国产欧美精品123区发布| 无码人妻精品一区二区蜜桃网站| 男人扒女人添高潮视频 | 久久伊人色AV天堂九九小黄鸭| 亚洲最大AV资源站无码AV网址| 男人用嘴添女人私密视频| 国产九九九九九九九A片| 国产午夜无码福利在线看网站| 豆国产95在线 | 亚洲| 4444亚洲人成无码网在线观看| 我的妺妺H伦浴室无码视频 | 国产精品亚洲一区二区无码| 好吊色欧美一区二区三区视频| 98国产精品人妻无码免费| 少妇白浆高潮无码免费区| 精品亚洲AV无码区最新| 午夜精品久久久内射近拍高清| 又爽又黄无遮挡高潮视频网站| 国产欧美日韩精品丝袜高跟鞋| 国产精品亚洲一区二区无码| 熟女少妇在线视频播放| 国产99在线 | 亚洲| 少妇伦子伦精品无码STYLES | 国产精品久久午夜夜伦鲁鲁| 成全视频免费高清观看在线动漫| 色偷偷88888欧美精品久久久 | 丰满少妇作爱视频免费观看| 亚洲爆乳无码精品aaa片蜜桃|