公开(公告)号：US3650696A

公开(公告)日：1972-03-21

申请号：US3650696D

申请日：1970-09-08

申请人： LAMAR STATE COLLEGE OF TECHNOL

发明人： EADS EWIN A

IPC分类号： G01N31/16 ,  G01N33/00 ,  G01N31/08

CPC分类号： G01N33/0047 ,  G01N31/16 ,  G01N33/0044 ,  Y02A50/248 ,  Y10T436/145555 ,  Y10T436/188

摘要： A method for accurately sampling ambient air containing sulfur compounds in the low parts per billion range and for separating, identifying and quantitatively monitoring each sulfur compound. The gaseous sample is collected in substantially sulfur-free methanol. The methanol solution is then passed through a gas chromatograph column packed with octylphenoxypolyethylene on oxyethanol polytetrafluoroethylene to separate the sulfur compounds. From the gas chromatograph the separated sulfur compounds go through a pyrolysis furnace where they are oxidized to sulfur dioxide, and thence into a microcoulometer for titration. By using the same procedure, sulfur compound impurities in solid materials can be identified and quantitatively measured.

摘要翻译： 一种在十亿分之几的范围内精确抽取含有硫化合物的环境空气的方法，用于分离，鉴定和定量监测每种硫化合物。 将气态样品收集在基本上不含硫的甲醇中。 然后将甲醇溶液通过填充有羟基乙醇聚四氟乙烯上的辛基苯氧基聚乙烯的气相色谱柱，以分离硫化合物。 从气相色谱仪中分离出的硫化合物经过热解炉，在那里它们被氧化成二氧化硫，然后进入微量计用于滴定。 通过使用相同的程序，可以鉴定和定量测量固体材料中的硫化合物杂质。

公开(公告)号：US3578406A

公开(公告)日：1971-05-11

申请号：US3578406D

申请日：1969-03-03

申请人： ATOMIC ENERGY COMMISSION

发明人： CHO BOONG Y ,  ANDERSON LARRY B

IPC分类号： G01N33/00 ,  G01N23/00

CPC分类号： G01N33/0013 ,  G01N33/0042 ,  Y02A50/248 ,  Y10T436/186

摘要： A QUANTITATIVE DETERMINATION OF RELATIVELY SMALL OR TRACE AMOUNTS OF GASEOUS SULFUR DIOXIDE INVOLVES A REACTION BETWEEN MERCUROUS CHLORIDE AND SULFUROUS ACID, THE LATTER FOAMED WHEN SULFUR DIOXIDE IS DISSOLVED IN WATER. ONE OF THE REACTION PRODUCTS IS A WATER SOLUBLE BIS-SULFITOMERCURATE COMPLEX, THE MERCURATE BEING EASILY REMOVABLE FROM THE REMAINDER OF THE REACTION MIXTURE. THE CONVERSION OF SULFUR DIOXIDE TO THE BIS-SULFITOMERCURATE COMPLEX IS ABOUT 95% COMPLETE. BY NUCLEONICALLY DETECTING THE AMOUNT OF THE BIS-SULFITOMERCURATE COMPLEX, WHICH CONTAINS A METAL HAVING A HIGH Z NUMBER (ATOMIC NUMBER), USING A MONOENERGETIC SOURCE OF NUCLEAR RADIATION IN THE RANGE OF 15 TO 25 KEV., THE AMOUNT OF THE COMPLEX IS DETERMINABLE AND EASILY COMPARED AGAINST A KNOWN STANDARD SAMPLE EITHER ELECTRONICALLY OR VISUALLY. THE PRESENT SYSTEM MAY BE USED ON A CONTINUOUSLY FLOWING GAS SUCH AS STACK GAS, IN WHICH EVENT IT IS UNNECESSARY TO SCRUB THE GAS, AND PERMITTING ACCURATE DETERMINATION OF TRACE AMOUNTS OF SULFUR DIOXIDE BY MONITORING OR CONTROLLING THE GAS FLOW RATE.