www.cgongxi.com-国产日产久久高清欧美一区WW,国产在线观看无码免费视频,国产日产久久高清欧美一区WW,国模欢欢炮交啪啪150P

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管>氣體快速檢測管>171SB甲醛HCHO氣體檢知管171SB FORMALDEHYDE 1-35ppm

甲醛HCHO氣體檢知管171SB FORMALDEHYDE 1-35ppm

簡(jiǎn)要描述:

甲醛HCHO氣體檢知管171SB FORMALDEHYDE 1-35ppm,甲醛對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為對皮膚粘膜的刺激作用,甲醛是原漿毒物質(zhì),能與蛋白質(zhì)結合、高濃度吸入時(shí)出現呼吸道嚴重的刺激和水腫、眼刺激、頭痛。b. 致敏作用: 皮膚直接接觸甲醛可引起過(guò)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)驗動(dòng)物在實(shí)驗室高濃度吸入的情況下,可引起鼻咽腫瘤。

更新時(shí)間:2024-07-14

在線(xiàn)留言
甲醛HCHO氣體檢知管171SB FORMALDEHYDE 1-35ppm

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

宽甸| 海盐县| 西吉县| 璧山县| 大竹县| 德保县| 莱州市| 都兰县| 辽中县| 开远市| 寿阳县| 新泰市| 临湘市| 洪江市| 清丰县| 永仁县| 夹江县| 绵阳市| 惠东县| 启东市| 侯马市| 乐至县| 萍乡市| 琼结县| 集安市| 永城市| 沾益县| 公主岭市| 雷波县| 疏附县| 齐齐哈尔市| 河东区| 邳州市| 桐乡市| 巴彦县| 吉木萨尔县| 肇庆市| 晋州市| 长丰县| 监利县| 邻水|