久久久久久精品成人免费图片,(原创)露脸自拍[62p],免费60分钟床,国内最真实的xxxx人伦

產品列表PRODUCTS LIST

首頁>產品中心>日本光明北川式氣體檢測管>氣體快速檢測管>187S總烴氣體檢測管187S GENERAL HYDROCARBONS 50-1400ppm

總烴氣體檢測管187S GENERAL HYDROCARBONS 50-1400ppm

簡要描述:

187S GENERAL HYDROCARBONS (+) 總烴,50-1400ppm Cyclohexane 環(huán)己烷C6H12 檢測管為什么會有顏色變化?發(fā)生顏色變化的真正原因是檢測管里面的檢測試劑與氣體接觸時,發(fā)生的化學反應,從而生成了另外一種不同的物質。
例如,當二氧化碳檢測管里面的白色試劑接觸到二氧化碳氣體時,發(fā)生變化生成了另外一種紫色的物質。當氧氣檢測管里面的黑色試劑與氧氣接觸時,發(fā)生變化生成了另外一種白色的物質。

更新時間:2025-01-08

在線留言
總烴氣體檢測管187S GENERAL HYDROCARBONS 50-1400ppm

總烴氣體檢測管187S GENERAL HYDROCARBONS 50-1400ppm

Tube No.
137
1. PERFORMANCE
1) Measuring range :50-1,400 ppm(as n-Hexane)
Number of pump strokes 1(100ml)
2 pump strokes(200ml)are required for Kerosine and Mineral tupentine
determination.
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :5 ppm
4) Shelf life :2 years
5) Operating temperature :0~40℃
6) Temperature compensation :Necessary(refer to "Table 2. Temperature CorrectionTable")
7) Reading :Direct reading from the scale calibrated by 1 pump stroke
8) Colour change :Orange→Yellowish green
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:5% RSD-high:5%(Controlled on n-Hexane)
3. CHEMICAL REACTION
Chromium oxide is reduced.
CH3(CH2)4CH3+Cr6++H2SO4→Cr3+
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
1400
1200
1000
800
600
400
200
100
50
ppm
????
187S GENERAL HYDROCARBONS
Substance Interference Coexistence
The bottom of the discoloured
Aromatic hydrocarbons layer is changed to Black and
higher readings are given.
It has no influence on readings even if Alcohols, Esters or Ketones each co-exists up to 6%.
(NOTE)
1)Determine the concentration of objective gas by multiplication with the figure shown in Table 1 after
temperature correction.
Example)For measuring Heptane at 10℃ of temperature
Reading concentration :600 ppm
Concentration on temperature correction :660 ppm
Concentration of Heptane :990 ppm
Table.2 Temperature Correction Table (20℃standard)
Readings 0℃ 10℃ 20℃ 30℃ 40℃
1400 1630 1530 1400 1270 1180
1200 1400 1320 1200 1090 1010
1000 1170 1100 1000 910 840
800 930 870 800 720 670
600 700 660 600 550 500
400 460 430 400 360 330
200 220 210 200 180 170
100 100 100 100 100 100
Unit:ppm
Name of Gas Figure Name of Gas Figure
Isobutane 0.8 Heptane 1.5
Pentane 0.8 Octane 2.0
n-Hexane 1.0 Cyclohexane 1.0
Table.1 Coefficient Chart

厨房的春潮a片| 绿帽娇妻肚子被灌满精怀孕| 欧美性猛交xxxx| 青青草在线视频| 性兴奋流出来白色粘稠液体| 免费人做人爱视频| 欧美巨大gay| 奇米影视777| 白嫩白嫩bbwbbwbbw| 寡妇bwwbwwbww| 五个丝袜女警榨精嗯啊哦哦| 公交车上拨开少妇内裤进入| 欧美精品久久久久a片18的试看 | 麻豆av福利av久久av| 女人高潮的24种图片| 将军脔到她哭h粗话h| 中文字幕亚洲乱码熟女在线萌芽| 欧美av蜜桃一区二区蜜桃 | 国产精品女a片爽视频爽 | 特级毛片a级毛片100免费播放| 国产麻传媒精品国产av| 人人妻人人澡人人爽人人精品| 亚洲国产精品99久久久久久| 精品国产制服丝袜高跟| 寡妇玩xxxxxx猛男吃奶| 女学生被躁到高潮免费视频| 东京热加勒比高清无线| 调教女m屁股撅虐调教| 成 人3d动漫在线观看| 熟妇人妻一区二区三区四区| 蜜臀av人妻久久无码精品麻豆| 老师你的真嫩真紧av視頻| 玩弄japan白嫩少妇hd小说| 免费看国产曰批40分钟无码| 声声奶酥1v办公室| 扒开她粉嫩的小缝的a片| 少妇人妻偷人精品无码视频| 国产亚州精品女人久久久久久| 亚洲日韩精品欧美一区二区一| 日产精品一区二区| 国产精品 高清 尿 小便 嘘嘘|