3%OV-17/101填充柱 HJ/T 34-1999 固定污染源排气中氯乙烯的测定

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HJ/T 34-1999 固定污染源排气中氯乙烯的测定
HJ/T 34-1999 固定污染源排气中氯乙烯的测定 详细信息：
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 固定污染源排气中氯乙烯的测定 气相色谱法
1 适用范围

1.1 本标准适用于固定污染源有组织排放和无组织排放的氯乙烯测定。

1.2 当色谱进样量为3ml时，方法的检出限为0.08mg/m3，定量测定的浓度下限为0.26mg/m3，上限可达1×104mg/m3，浓度范围。

2 方法原理

氯乙烯用注射器直接进样，经色谱柱分离后，被氢火焰离子化检测器测定，以色谱峰的保留时间定性，峰高（或峰面积）定量。

3 引用标准

      下列标准所包含的条文，通过在本标准中的引用而构成为本标准的条文：

      GB 16297-1996 大气污染物综合排放标准

      GB 16157-1996 固定污染源排气中颗粒物测定和气态污染物采样方法

4 试剂和材料

4.1 色谱固定液：苯基(50%）甲基硅酮(OV17)，色谱试剂。

4.2 载体：硅藻±101硅烷化80~100目。

4.3 载气：纯氮（体积分数为99. 99%)。

4.4 燃烧气：纯氢（体积分数为99.9%)。

4.5 助燃气：空气。
4.6 丙酮：分析纯。

4.7 氯乙烯标准气：10~100mg/m3。

      标准气的稀释方法（参照《空气和废气监测分析方法》(1990) P42)。

      100 ml的全玻璃注射器（预先检测气密性不要漏气）中放入几块聚四氟乙烯塑料片，注射器内有精确体积的空气或氮气，在注射器口套上一个硅橡胶帽，根据需要的气体浓度，用小容量注射器，精确的取一定量的标准气，注入100 ml针筒内，摇动，使塑料片反复振动，使混合气均匀。每种标准气的稀释重复操作二次取其平均值，其相对误差应小于5％。

5 仪器

5.1 气相色谱仪：具氢火焰离子化检测器。

5.2 色谱柱

5.2.1 柱特征：长2m，内径3 mm的不锈钢或玻璃填充柱。