HJ/T 34-1999 固定污染源排氣中氯乙烯的測定，室內(nèi)空氣TVOC，增塑劑，塑化劑，醫(yī)療器械，環(huán)氧乙烷，消毒劑，氨水，氨氣，過氧化物，三甲胺，煉廠氣，口罩，甲酸，甲醛，氨水

HJ/T 34-1999 固定污染源排氣中氯乙烯的測定
HJ/T 34-1999 固定污染源排氣中氯乙烯的測定 詳細信息：
HJ/T 34-1999 Determination of vinyl chloride in exhaust gas from stationary pollution sources-Gas chromatography
1 Scope of application

1.1 This standard is applicable to the determination of vinyl chloride in organized and unorganized emissions from stationary pollution sources.

1.2 When the chromatographic injection volume is 3ml, the detection limit of the method is 0.08mg/m3, the lower limit of the quantitative determination is 0.26mg/m3, and the upper limit can reach 1×104mg/m3, the concentration range.

2 Principles of the method

The vinyl chloride is directly injected with a syringe, and after being separated by a chromatographic column, it is measured by a hydrogen flame ionization detector, and is qualitatively determined by the retention time of the chromatographic peak and quantitatively by the peak height (or peak area).

3 Reference Standards

      The following standards contain provisions which, through reference in this standard, constitute provisions of this standard:

      GB 16297-1996 Comprehensive emission standard of air pollutants

      GB 16157-1996 Determination of particulate matter in exhaust gas from stationary pollution sources and sampling methods for gaseous pollutants

4 Reagents and Materials

4.1 Chromatographic fixative: phenyl (50%) methyl silicone (OV17), chromatographic reagent.

4.2 Carrier: Diatom ±101 silanized 80~100 mesh.

4.3 Carrier gas: pure nitrogen (volume fraction of 99.99%).

4.4 Combustion gas: pure hydrogen (99.9% by volume).

4.5 Supporting gas: air.
4.6 Acetone: analytically pure.

4.7 Standard gas of vinyl chloride: 10~100mg/m3.

      The dilution method of standard gas (refer to "Analysis Method for Air and Exhaust Gas Monitoring" (1990) P42).

      Put a few teflon plastic sheets in a 100 ml all-glass syringe (pre-test air tightness and do not leak), the syringe contains a precise volume of air or nitrogen, and put a silicone rubber cap on the syringe mouth, as needed Using a small-volume syringe, accurately take a certain amount of standard gas, inject it into a 100 ml syringe, shake it, and make the plastic sheet vibrate repeatedly to make the mixture even. The dilution of each standard gas is repeated twice and the average value is taken, and the relative error should be less than 5%.

5 Instruments

5.1 Gas chromatograph: with hydrogen flame ionization detector.

5.2 Column

5.2.1 Column characteristics: a stainless steel or glass packed column with a length of 2m and an inner diameter of 3mm.


HJ/T 34-1999 固定污染源排氣中氯乙烯的測定 氣相色譜法
1 適用范圍

1.1 本標準適用于固定污染源有組織排放和無組織排放的氯乙烯測定。

1.2 當色譜進樣量為3ml時，方法的檢出限為0.08mg/m3，定量測定的濃度下限為0.26mg/m3，上限可達1×104mg/m3，濃度范圍。

2 方法原理

氯乙烯用注射器直接進樣，經(jīng)色譜柱分離后，被氫火焰離子化檢測器測定，以色譜峰的保留時間定性，峰高（或峰面積）定量。

3 引用標準

      下列標準所包含的條文，通過在本標準中的引用而構成為本標準的條文：

      GB 16297-1996 大氣污染物綜合排放標準

      GB 16157-1996 固定污染源排氣中顆粒物測定和氣態(tài)污染物采樣方法

4 試劑和材料

4.1 色譜固定液：苯基(50%）甲基硅酮(OV17)，色譜試劑。

4.2 載體：硅藻±101硅烷化80~100目。

4.3 載氣：純氮（體積分數(shù)為99. 99%)。

4.4 燃燒氣：純氫（體積分數(shù)為99.9%)。

4.5 助燃氣：空氣。
4.6 丙酮：分析純。

4.7 氯乙烯標準氣：10~100mg/m3。

      標準氣的稀釋方法（參照《空氣和廢氣監(jiān)測分析方法》(1990) P42)。

      100 ml的全玻璃注射器（預先檢測氣密性不要漏氣）中放入幾塊聚四氟乙烯塑料片，注射器內(nèi)有精確體積的空氣或氮氣，在注射器口套上一個硅橡膠帽，根據(jù)需要的氣體濃度，用小容量注射器，精確的取一定量的標準氣，注入100 ml針筒內(nèi)，搖動，使塑料片反復振動，使混合氣均勻。每種標準氣的稀釋重復操作二次取其平均值，其相對誤差應小于5％。

5 儀器

5.1 氣相色譜儀：具氫火焰離子化檢測器。

5.2 色譜柱

5.2.1 柱特征：長2m，內(nèi)徑3 mm的不銹鋼或玻璃填充柱。