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甲醛HCHO氣體檢知管171SB FORMALDEHYDE 1-35ppm,甲醛對(duì)健康危害主要有以下幾個(gè)方面:a. 刺激作用: 甲醛的主要危害表現(xiàn)為對(duì)皮膚粘膜的刺激作用,甲醛是原漿毒物質(zhì),能與蛋白質(zhì)結(jié)合、高濃度吸入時(shí)出現(xiàn)呼吸道嚴(yán)重的刺激和水腫、眼刺激、頭痛。b. 致敏作用: 皮膚直接接觸甲醛可引起過敏性皮炎、色斑、壞死,吸入高濃度甲醛時(shí)可誘發(fā)支氣管哮喘。c. 致突變作用:高濃度甲醛還是一種基因毒性物質(zhì)。實(shí)驗(yàn)動(dòng)物在實(shí)驗(yàn)室高濃度吸入的情況下,可引起鼻咽腫瘤。
更新時(shí)間:2024-12-18
在線留言甲醛HCHO氣體檢知管171SB FORMALDEHYDE 1-35ppm
Tube 71SB
1. PERFORMANCE
1) Measuring range :1-35 ppm
Number of pump strokes :3(300ml)
2) Sampling time :3 minutes/3 pump strokes
3) Detectable limit :0.5 ppm
4) Shelf life :3 years
5) Operating temperature :0~40℃
6) Reading :Direct reading from the scale calibrated by 3 pump strokes
7) Colour change :White→Brownish orange
2. RELATIVE STANDARD DEVIATION
RSD-low:15% RSD-mid.:15% RSD-high:15%
3. CHEMICAL REACTION
By reacting with Aromatic compounds, a polymer is produced.
4. CALIBRATION OF THE TUBE
COLOURIMETRY METHOD
5. INTERFERENCE AND CROSS SENSITIVITY
GAS To pump
DETECTOR TUBE
(White)
PRETREAT TUBE
35
30
25
20
15
10
7 5 3
1
ppm
171SB FORMALDEHYDE
Substance Interference ppm Coexistence
Styrene Similar stain is produced. Higher readings are given.
Trichloroethylene 500 〃
Ethyl acetate 1,000 〃
Ether 1,000 〃
Acetaldehyde Similar stain is produced. 1 〃
HCHO+ +H2SO4 n+H2O
C
H
H
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