久久精品国产亚洲AV麻豆蜜芽,风流少妇A片一区二区蜜桃,国产精品久久久久精品三级卜 ,性欧美大战久久久久久久久

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>111U1,2,4-*基苯C6H3(CH3)3氣體檢測管111U 20-250ppm

1,2,4-*基苯C6H3(CH3)3氣體檢測管111U 20-250ppm

簡要描述:

1,2,4-*基苯C6H3(CH3)3氣體檢測管111U 1,2,4-TRIMETHYL BENZENE 20-250ppm,中文名稱2: 假枯烯,英文名稱2: pseudocumene,健康危害: 本品對眼、呼吸道有刺激作用;對中樞神經(jīng)系統(tǒng)有抑制作用。

更新時間:2024-11-13

在線留言
1,2,4-*基苯C6H3(CH3)3氣體檢測管111U 20-250ppm

1,2,4-*基苯C6H3(CH3)3氣體檢測管111U 1,2,4-TRIMETHYL BENZENE 20-250ppm

Tube 11U
1. PERFORMANCE
1) Measuring range :10-250 ppm
Number of pump strokes 1(100ml)
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :1 ppm
4) Shelf life :2 years
5) Operating temperature :0~40℃
6) Reading :Graduations printed on the tube are calibrated by Ethyl acetate at 1 pump stroke
and 1,2,4-trimethyl benzene is determined by using a conversion chart.
7) Colour change :Yellow→Dark brown
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:5% RSD-high:5%
3. CHEMICAL REACTION
Chromium oxide is reduced.
C6H3(CH3)3+Cr6++H2SO4→Cr3+
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
DEHUMIDIFIER
(White)
250
200
150
100
50
30
10
ppm
111U C 1,2,4-TRIMETHYL BENZENE
Substance Interference Coexistence
Alcohols Brown stain is produced. Higher readings are given.
Esters 〃〃
Ketones 〃〃
Aromatic hydrocarbons 〃〃
Aliphatic hydrocarbons Double-layer stain is produced. If the
(more than C3) dcaanrk b ber oowbnta sintaeidn bisy citl.ear, the readings
Halogenated hydrocarbons 〃
No. 111U Tube reading(ppm)?
(100ml)?
Trimethyl benzene(ppm)?
1000
800
600
400
200
100
50
20
20
150
200
50
100
25

韩国三级日本三级人与波| 日韩精品在线观看| 久久亚洲中文字幕伊人久久大| 翁公和在厨房猛烈进出| 无码人妻一区二区三区色欲AV| 亚洲AV中文无码字幕色三| 亚洲AV无码国产精品色| 一 级 黄 色 片免费网站| 国产AV熟女一区二区三区蜜桃| 私密浏览器视频免费观看| 草莓视频CAOMEI888| 人妻借种太粗进不去| 亚洲成A人无码亚洲成A无码L| 69精品人妻一区二区三区蜜桃| 粗大挺进尤物人妻中文字幕| 亚洲精品久久久久AV无码| 亚洲乱码国产乱码精品精大量| 少妇和黑人老外做爰69| 国产98在线 | 日韩| 国产AV成人无码免费视频| 日本少妇裸体做爰高潮片| 各种少妇WBB撒尿| 金鸽源赛鸽公棚春棚| 被强行糟蹋的女人A片| 国产69精品久久久久久人妻精品| 国产午夜福利短视频| AV鲁丝一区鲁丝二区鲁丝三区 | 一二三四免费观看完整版高清| 香蕉久久一区二区不卡无毒影院| 精品人妻无码一区二区三区,| 免费看少妇高潮A片特黄| 欧美亚洲国产SUV| 第一次破学生处视频免费观看| 中文字幕热久久久久久久| JAPANESE丰满人妻HD| 免费网站看SM调教打屁股视频 | ZOOM与人性ZOOM视频| 国产爆乳无码一区二区麻豆| 人妻女教师耻辱の教室| 香蕉久久久久久久AV网站| 久久人人爽人人爽人人片AV高清|