浩瀚色譜采用頂空氣相色譜測(cè)定空氣中甲醇和乙醇含量，方法簡(jiǎn)單、快速，無需使用有機(jī)試劑。本方法以蒸餾水吸收空氣中甲醇和乙醇，頂空進(jìn)樣經(jīng)填充柱柱分離，氫火焰離子化檢測(cè)器檢測(cè)，時(shí)間定性，峰面積定量，其甲醇加標(biāo)回收率為96.7％～104.6％，乙醇加標(biāo)回收率為94.7％～103.8％，當(dāng)在采樣體積為40 L的條件下，甲醇和乙醇最低檢出質(zhì)量濃度均為0.11 mg/m3。實(shí)際操作證明，該法能滿足工業(yè)廢氣和空氣中的甲醇和乙醇的監(jiān)測(cè)。
本標(biāo)準(zhǔn)適用于固定污染源有組織排放和無組織排放的甲醇測(cè)定。以3倍噪音色譜峰高值計(jì)算，當(dāng)色譜進(jìn)樣量為1.0ml時(shí)，方法的檢出限為2mg/m3；定量測(cè)定的濃度范圍為5.0～104mg/m3。
名稱:甲醇專用填充柱
型號(hào):5%Carbowax20M Carbopack B
規(guī)格:2m*3mm，80-120目
編號(hào):20240313009
*高使用溫度:220℃
應(yīng)用:HJT33-1999固定污染源排氣中甲醇的測(cè)定氣相色譜法
HaoHan Chromatography uses headspace gas chromatography to determine the content of methanol and ethanol in the air. The method is simple, fast, and does not require the use of organic reagents. In this method, distilled water is used to absorb methanol and ethanol in the air, and the headspace sample is separated by a packed column. The hydrogen flame ionization detector detects the time and qualitatively, and the peak area quantitatively. The recovery rate of methanol spiked is 96.7% to 104.6%, and the recovery rate of ethanol spiked is 94.7% to 103.8%. When the sampling volume is 40 L, the minimum detectable mass concentration of methanol and ethanol is 0.11 mg/m3. Practical operation proves that this method can meet the monitoring of methanol and ethanol in industrial waste gas and air.
This standard is applicable to the determination of methanol emissions from fixed pollution sources, both organized and unorganized. When the injection volume of the chromatography is 1.0 ml, the detection limit of the method is 2 mg/m3, calculated as 3 times the noise chromatographic peak height. The concentration range for quantitative determination is 5.0-104 mg/m3.
Name: Methanol special packing column
Model: 5% Carbowax20M Carbopack B
Specification: 2m*3mm, 80-120 mesh
No.: 20240313009
*High operating temperature: 220℃
Application: HJT33-1999 Determination of Methanol in Exhaust from Stationary Source Gas Chromatography