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二丙酮醇又名雙丙酮醇 DIACETONE ALCOHOL 英文簡稱DAA,190U DIACETONE ALCOHOL (+) 10-250ppm (CH3)2C(OH)CH2COCH3,二丙酮醇氣體檢測管190U DIACETONE ALCOHOL 10-250ppm,一種聯管式氣體檢測管,它屬于氣體快速檢測裝置,該檢測管的結構是在玻璃管內填充兩種不同的被測氣體指示粉,指示粉由載體和反應劑混合而成,載體可以選擇石英砂、硅膠、玻璃粉等,玻璃管外壁對應于兩種不同的指示粉部位分別標有表明被測氣體濃度
更新時間:2024-12-18
在線留言二丙酮醇氣體檢測管190U DIACETONE ALCOHOL 10-250ppm
1. PERFORMANCE
1) Measuring range :10-250 ppm
Number of pump strokes 3(300ml)
2) Sampling time :4.5 minutes/3 pump strokes
3) Detectable limit :1 ppm
4) Shelf life :2 years
5) Operating temperature :10~40℃
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 Diacetone alcohol concentration is determined by using a conversion chart.
8) Colour change :Yellow→Pale blue
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:5% RSD-high:5%
3. CHEMICAL REACTION
Chromium oxide is reduced.
(CH3)2C(OH)CH2COCH3+Cr6++H2SO4→Cr3+
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
200
150
500
400
300
100
50
20
5
300ml
ppm
(White)
DEHUMIDIFIER
Tube No.
DIACETONE ALCOHOL
92
Substance Interference Coexistence
Alcohols FIG.1 Similar stain is produced. Higher readings are given.
Halogenated hydrocarbons 〃
Aliphatic hydrocarbons Whole reagent is discoloured to It the top of Pale blue stain is clear,the
Pale brown. accuracy of readings is not affected.
Aromatic hydrocarbons 〃〃
Esters 〃〃
0
20
30
40
50
10
Ethanol〔ppm〕?
FIG.1 Influence of Ethanol
Diacetone indicating value 〔ppm〕
50 100
Coexistence
Interference
Diacetone alcohol(ppm)?
90U Tube reading(ppm)
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