夜夜爽夜夜叫夜夜高潮漏水,13小男生GAY自慰脱裤子,亚洲国产精品美女久久久久AV,中文字幕丰满乱孑伦无码专区

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糠醛CsH4O2氣體檢測管190U FURFURAL 2-60ppm

糠醛CsH4O2氣體檢測管190U FURFURAL 2-60ppm

簡要描述:

檢測管不僅可用于室內(nèi)空氣檢測、公共場所的空氣質(zhì)量監(jiān)測、作業(yè)現(xiàn)場的空氣及特定氣體的測試、大氣環(huán)境檢測等許多方面,也被用于許多需要控制氣體成分的生產(chǎn)工藝中。檢測管是掌握和分析氣體成分和濃度的有效、安全和簡便的方法。糠醛CsH4O2氣體檢測管190U FURFURAL 2-60ppm,氣體檢測管是用來測定某種氣體在某一環(huán)境中所含濃度的簡易檢測裝置。通過檢測劑與被檢測氣體的反應(yīng)而出現(xiàn)顏色變化、來表示所測環(huán)境中的氣體濃度。具有操作簡單、使用范圍廣泛、檢測凖確、實(shí)時性強(qiáng)和經(jīng)濟(jì)的特點(diǎn)。

更新時間:2024-12-18

發(fā)郵件給我們:554328895@qq.com

分享到: 1
在線留言
糠醛CsH4O2氣體檢測管190U FURFURAL 2-60ppm

糠醛CsH4O2氣體檢測管190U FURFURAL 2-60ppm

Tube 90U
1. PERFORMANCE
1) Measuring range :2-60 ppm
Number of pump strokes 3(300 ml)
2) Sampling time :4.5 minutes / 3 pump strokes
3) Detectable limit :0.5 ppm
4) Shelf life :3 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 Furfural concentration is determined by using a conversion chart.
8) Colour change :Yellow→Pale blue
2. RELATIVE STANDARD DEVIATION
RSD-low:15% RSD-mid.:10% RSD-high:10%
3. CHEMICAL REACTION
Chromium oxide is reduced.
CH=CH
O +H2SO4+Cr6+→Cr3+
CH=C-CHO
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
500
400
300
200
150
100
50
20
5
ppm
(White)
DEHUMIDIFIER
190U C FURFURAL
Substance ppm Interference Coexistence
Alcohols Similar stains are produced and higher
readings are given.
Toluene 200 Whole reagent is changed to Pale orange. Unclear stains are produced.
TEMPERATURE CORRECTION TABLE
Conver. Corrected Concentration (ppm)
value 0℃ 10℃ 20℃ 30℃ 40℃
(ppm) (32°F) (50°F) (68°F) (86°F) (104°F)
60 - - 60 50 45
50 - 71 50 45 40
40 - 53 40 35 35
30 63 35 30 30 30
20 25 22 20 20 20
15 17 15 15 15 15
10 10 10 10 10 10
5 5 5 5 5 5
2 2 2 2 2 2
90U Tube reading (ppm)?
(300mR)?
Furfural(ppm)?
500
400
300
200
100
50
20
5
2
5
10
20
30
40
50