Development of the measuring method of sublimable boron compound concentration in plant emission gas and in the environmental atmosphere.

大气中的硼化合物对植物造成的损害已经造成。这在世界上是没有先例的。流域系统的植物破坏也有一些例子，水质环境标准也是明确的。然而，由于大气中硼化合物对植物的危害尚未报道，没有法律法规体系，现阶段也没有建立测定方法，我们立即开发了一种在烟道外提取的方法(目前使用的是II型烟囱采样器)，用于测定气相硼化合物。然而，由于天然化合物的升华性质，测量结果相差很大，重现性较低，因此我们开发了直接在烟道内提取的方法(II型烟囱采样器)。该方法不受废气中硼化合物升华性质的影响。此外，这种方法几乎不受分压和…的影响更多的还受烟道内外温差的影响。同时，我们研究了最合适的捕收剂。使用人工堆积室进行测量方法的检验，将由SUS制成的很小的滤架(用于25 mm滤纸)直接插入堆积室。第一步颗粒收集采用特氟龙过滤器，第二步和第三步分别放置浸碱滤纸收集气态硼化合物。以1L/min的速度采集1h。采集纸用超纯水超声提取，用一次性过滤器过滤，用电感耦合等离子体质谱仪测定。在2005或2006财年检查了六种碱浸渍一次性滤纸(碳酸钾、碳酸钠、氢氧化锂、氢氧化钡、碳酸钙和氢氧化镁)。由于这些年我们使用纤维素过滤器，人工烟囱的最高温度被强制降至70摄氏度。众所周知，实际的电堆温度约为180℃。因此，在2007财年，我们使用了铝制耐热垫片，并检测了浸渍碳酸钾和碳酸钠的耐热石英纤维滤纸。结果证实了这些浸渍石英纤维滤纸的耐热性能，并使测量成为可能。较少

The plant damage due to by the boron compound in the atmosphere has caused. There is no precedent for this in the world. There are some examples about the plant damage of a basin system, and the environmental standard for water quality is definite. However, since the plant damage by the boron compounds in the atmosphere has not been reported, there is no legal regulation system, and the measuring method is not established in the present stage.We have immediately developed an extracting method in the outside of flue (currently used the type-II stack sampler) for the measurement of gas phase boron compounds. However, due to the sublimable nature of born compounds, the measurements vary widely and the reproducibility was low.Therefore, we developed the method of extracting directly within a flue (the type-II stack sampler). This method is not influenced by the sublimable nature of boron compounds in the emission gas. Furthermore this method is hardly influenced by the partial pressure and … More also by the temperature difference between the inside and outside of flue. At the same time, we examined the most suitable collection agent.An artificial stack chamber is used for the examination of measuring method.The very small filter holder made from SUS (for 25mmefilter paper) was directly inserted into the stack chamber. Teflon filter was used for the 1st step collection of particles, and alkali impregnated filter papers were set to the 2nd and the 3rd steps for collection of gaseous boron compounds. The collection was carried out for 1 hour by 1L/min. The collection papers were treated with the ultrasonic extraction by ultrapure water, filtered with a disposable filter, and measured with an ICP-mass spectrometer. Six kinds of alkali impregnation disposable filter papers (potassium carbonate, sodium carbonate, lithium hydroxide, barium hydroxide, calcium carbonate, and magnesium hydroxide) were examined in the 2005 or 2006 fiscal years.Since we used cellulose filters in these years, the maximum temperature of the artificial stack was forced down to 70-C. It is generally known that the practical stack temperature is about 180℃. Therefore, in the 2007 fiscal year, we used the heat-resistant gasket made from aluminum, and examined the heat-resistant quartz fiber filter papers of potassium carbonate and sodium carbonate impregnated. As a result, the heat-resisting properties of these impregnation quartz fiber filter papers were confirmed and the measurement became possible. Less