B.2.1 原理
用活性炭管采集空氣中丙酮，用二硫化碳解吸，經(jīng) PorapakQ 柱分離后，用氫焰離子化檢
測(cè)器檢測(cè)，以保留時(shí)間定性，峰高定量。
B.2.2 儀器
（1） 活性炭管：用長(zhǎng) 7cm，內(nèi)徑 4mm，外徑 6mm 玻璃管，內(nèi)裝兩段 20～40 目椰子殼
活性炭，中間用玻璃棉或氨基甲酸乙酯泡沫塑料墊隔開(kāi)，玻璃管二端用火熔封，可供長(zhǎng)期保
存應(yīng)用。如短時(shí)間內(nèi)應(yīng)用，可套上塑料帽保存。在裝管前應(yīng)先將活性炭于 300～350℃通氮?dú)?/p>
處理 3～4h，管中前段裝 100mg，后段裝 50mg 活性炭。后段活性炭外邊用玻璃棉或氨基甲
酸乙酯泡沫塑料固定。前段活性炭外邊則用玻璃棉固定。
（2） 采樣泵，0～1L/min。
（3） 微量注射器，100?l，10?l，1?l。
（4） 具塞試管，5ml。
（5） 氣相色譜儀，氫焰離子化檢測(cè)器。55ng 丙酮給出的信噪比不低于 3∶1。
色譜柱：柱長(zhǎng) 2m、內(nèi)徑 4mm 不銹鋼柱。
固定相：Porapak Q，50～80 目
柱溫：150℃
汽化室溫度：200℃
檢測(cè)室溫度：180℃
載氣(氮?dú)?：30ml/min
B.2.3 試劑
18
（1） 丙酮，色譜純。
（2） Porapak Q 擔(dān)體，50～80 目。
（3） 二硫化碳，色譜鑒定無(wú)雜質(zhì)峰。
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名稱：填充柱
固定相：高分子小球
規(guī)格：2m*4mm（內(nèi)徑）
型號(hào)：Porapak Q，50-80目
應(yīng)用：環(huán)氧樹(shù)脂工業(yè)污染物排放標(biāo)準(zhǔn)‘大氣中丙酮測(cè)定方法 氣相色譜法’
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B. 2.1 Principle
Collect acetone from the air using an activated carbon tube, desorb it using carbon disulfide, separate it using a PorapakQ column, and detect it using a hydrogen flame ionization detector
Measurement instrument detection, qualitative retention time and quantitative peak height.
B. 2.2 Instruments
(1) Activated carbon tube: Use a 7cm long, 4mm inner diameter, and 6mm outer diameter glass tube, with two sections of 20-40 mesh coconut shell inside
Activated carbon, separated by glass wool or urethane foam plastic pad in the middle, and the two ends of glass tube are sealed by fire for long-term protection
Save application. If applied for a short period of time, it can be stored with a plastic cap. Before piping, the activated carbon should be purged with nitrogen at 300-350 ℃
Process for 3-4 hours, with 100mg of activated carbon in the front section and 50mg of activated carbon in the back section of the tube. The outer edge of the activated carbon in the later stage is made of glass wool or amino methyl
Fixed with ethyl acetate foam. The outer edge of the activated carbon in the front section is fixed with glass wool.
(2) Sampling pump, 0-1L/min.
(3) Micro injector, 100? l，10? l，1? l。
(4) Tube with stopper, 5ml.
(5) Gas chromatograph, hydrogen flame ionization detector. The signal-to-noise ratio given by 55ng acetone is not less than 3:1.
Chromatography column: Column length 2m, inner diameter 4mm stainless steel column.
Fixed phase: Porapak Q, 50-80 mesh
Column temperature: 150 ℃
Vaporization chamber temperature: 200 ℃
Testing room temperature: 180 ℃
Carrier gas (nitrogen): 30ml/min
B. 2.3 Reagents
eighteen
(1) Acetone, chromatographically pure.
(2) Porapak Q carrier, 50-80 mesh.
(3) Carbon disulfide, chromatographic identification shows no impurity peaks.
Name: Filler Column
Fixed phase: polymer spheres
Specification: 2m * 4mm (inner diameter)
Model: Porapak Q, 50-80 mesh
Application: Pollutant Emission Standard for Epoxy Resin Industry - Determination of Acetone in the Atmosphere - Gas Chromatography Method
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