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四氫呋喃THF氣體測毒管162U TETRAHYDROFURAN 20-400ppm,四氫呋喃是一類雜環(huán)有機化合物.它是Z強的極性醚類之一,在化學(xué)反應(yīng)和萃取時用做一種中等極性的溶劑。變成過氧化物。因此,商用的THF經(jīng)常是用BHT,即2,6一二叔丁基對甲酚來防止氧化。中文名: 四氫呋喃;氧戊環(huán) 英文名:Tetrahydrofuran;THF CAS號:109-99-9 RTECS:LU5950000 分子式:C4-H8-O,車間空氣衛(wèi)生標(biāo)準(zhǔn):中國MAC 300 mg/m3 (1996)
更新時間:2024-11-13
在線留言四氫呋喃氣體測毒管162U TETRAHYDROFURAN 20-400ppm
Tube 62U
1. PERFORMANCE
1) Measuring range :20-400 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 :0~40℃
6) Temperature compensation :Necessary(See "TEMPERATURE CORRECTION TABLE")
7) Reading :Direct reading from the scale calibrated by 1 pump stroke
8) Colour change :Pale yellow→Pale blue
2. RELATIVE STANDARD DEVIATION
RSD-low:10% RSD-mid.:10% RSD-high:5%
3. CHEMICAL REACTION
Potassium dichromate is reduced.
CH2-CH2
O+Cr6++H2SO4→Cr3+
CH2-CH2
4. CALIBRATION OF THE TUBE
GAS CHROMATOGRAPHY
5. INTERFERENCE AND CROSS SENSITIVITY
ppm
400
300
200
150
100
50
20
GAS To pump
DEHUMIDIFIER
(White)
162U TETRAHYDROFURAN
Substance Interference Coexistence
Alcohols Similar stain is produced. Higher readings are given.
Esters Whole reagent is changed to Black. 〃
Ketones 〃〃
Aromatic hydrocarbons 〃〃
TEMPERATURE CORRECTION TABLE
Scale True Concentration (ppm)
Readings 10℃ 20℃ 30℃ 40℃
(ppm) (50°F) (68°F) (86°F) (104°F)
500 680 500 390 320
400 540 400 320 250
300 400 300 240 190
200 260 200 160 130
150 190 150 120 90
100 130 100 80 60
50 60 50 40 30
20 30 20 20 10
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