无套内谢少妇毛片A片软件,日韩精品极品视频在线观看免费,久久人做人爽一区二区三区,欧美肥妇BWBWBWBXX

產(chǎn)品列表PRODUCTS LIST

首頁(yè)>產(chǎn)品中心>日本光明北川式氣體檢測(cè)管>氣體快速檢測(cè)管>111U乙酸乙酯氣體檢知管 111U ETHYL ACETATE CH3CO2C2H5 10-1000ppm

乙酸乙酯氣體檢知管 111U ETHYL ACETATE CH3CO2C2H5 10-1000ppm

簡(jiǎn)要描述:

乙酸乙酯氣體檢知管 111U ETHYL ACETATE CH3CO2C2H5 10-1000ppm,氣體檢測(cè)管是在一個(gè)固定長(zhǎng)度和內(nèi)徑的玻璃管內(nèi),裝填一定量的檢測(cè)劑,用塞料加以固定,再將玻璃管兩端熔封。使用時(shí)將管子兩端割斷,讓含有被測(cè)物質(zhì)的氣體定量地通過(guò)管子,被測(cè)物質(zhì)即和管中檢測(cè)劑發(fā)生定量化學(xué)反應(yīng),部分檢測(cè)劑被染色,其染色長(zhǎng)度與被測(cè)物濃度成正比,從檢測(cè)管上已印制好的刻度即得知被測(cè)氣體的濃度。

更新時(shí)間:2025-01-01

發(fā)郵件給我們:554328895@qq.com

分享到: 1
在線(xiàn)留言
乙酸乙酯氣體檢知管 111U ETHYL ACETATE CH3CO2C2H5 10-1000ppm

乙酸乙酯氣體檢知管 111U ETHYL ACETATE CH3CO2C2H5 10-1000ppm

Tube 11U

1. PERFORMANCE
1) Measuring range :20-1,000 ppm
Number of pump strokes 1(100ml)
2) Sampling time :1.5 minutes/1 pump stroke
3) Detectable limit :10 ppm
4) Shelf life : :2 years
5) Operating temperature :10~40℃
6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 1 pump stroke
8) Colour change :Yellow→Brown
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:10% RSD-high:5%
3. CHEMICAL REACTION
Chromium oxide is reduced.
CH3CO2C2H5+Cr6++H2SO4→Cr3+
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
1000
800
600
400
200
100
50
20
?? ??
111U ETHYL ACETATE
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 10℃ 15℃ 20℃ 25℃ 30℃ 35℃ 40℃
(ppm) (50°F) (59°F) (68°F) (77°F) (86°F) (95°F) (104°F)
1,000 1,330 1,200 1,000 830 700 600 500
800 1,080 950 800 670 550 470 400
600 830 720 600 500 420 380 300
400 570 480 400 330 280 240 200
200 280 240 200 170 140 120 100
100 150 120 100 80 70 60 50
50 70 60 50 40 30 20 10
20 30 25 20 15 10 7 4
Substance Interference Coexistence
Alcohols Similar stain is produced. Higher reading are given.
Esters 〃〃
Ketones 〃〃
Aromatic hydrocarbons 〃〃
Whole reagent is discoloured to It the top of brown stain is clear,
Paraffin hydrocarbons Pale brown. athffee catcecdu.racy of readings is not
Halogenated hydrocarbons FIG.1 〃〃
0
200
400
600
800
1000
Trichloroethylene〔ppm〕?
FIG.1 Influence of Trichloroethylene
Ethyl acetate indicating value 〔ppm〕
100 200 300