Test Method Method 16A Detrmination of Total Reduced Sulfur 还原硫试验方法16A总含量的测定.docVIP

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Test Method Method 16A Detrmination of Total Reduced Sulfur 还原硫试验方法16A总含量的测定.doc

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Test Method Method 16A Detrmination of Total Reduced Sulfur 还原硫试验方法16A总含量的测定

State of California Air Resources Board Method 16A Determination of Total Reduced Sulfur Emissions from Stationary Sources (Impinger Technique) Adopted: January 22, 1987 Amended: July 1, 1999 Method 16A - Determination of Total Reduced Sulfur Emissions from Stationary Sources (Impinger Technique) 1. APPLICABILITY, PRINCIPLE, INTERFERENCES, PRECISION, AND BIAS 1.1 Applicability. This method is applicable to the determination of total reduced sulfur (TRS) emissions from recovery boilers, lime kilns, and smelt dissolving tanks at kraft pulp mills, and from other sources when specified in an applicable subpart of the regulations. The TRS compounds include hydrogen sulfide, methyl mercaptan, dimethyl sulfide, and dimethyl disulfide. The flue gas must contain at least 1 percent oxygen for complete oxidation of all TRS to sulfur dioxide (SO2). The lower detectable limit is 0.1 ppm SO2 when sampling at 2 liters/min for 3 hours or 0.3 ppm when sampling at 2 liters/min for 1 hour. The upper concentration limit of the method exceeds TRS levels generally encountered at kraft pulp mills. 1.2 Principle. An integrated gas sample is extracted from the stack. SO2 is removed selectively from the sample using a citrate buffer solution. TRS compounds are then thermally oxidized to SO2, collected in hydrogen peroxide as sulfate, and analyzed by the Method 6 barium-thorin titration procedure. Any modification of this method beyond those expressly permitted shall be considered a major modification subject to the approval of the Executive Officer. The term Executive Officer as used in this document shall mean the Executive Officer of the Air Resources Board (ARB), or his or her authorized representative. 1.3 Interferences. TRS compounds other than those regulated by the emission standards, if present, may be measured by this method. Therefore, carbonyl sulfide, which is partially oxidized to SO2 and may be present in a lime kiln exit stack, would be a positive