热力发电
熱力髮電
열력발전
THERMAL POWER GENERATION
2009年
7期
110-113
,共4页
粉煤灰%固体样品%预处理%高压消化%硫化物%原子吸收法
粉煤灰%固體樣品%預處理%高壓消化%硫化物%原子吸收法
분매회%고체양품%예처리%고압소화%류화물%원자흡수법
pulverized coal ash%solid sample%pretreat%high-pressure digestion%atom absorption
开发了一种测定固体样品中硫化物的方法.采用高压密封消化法处理火电厂粉煤灰,使硫化物转变成硫酸盐并与铬酸钡进行定量反应生成硫酸钡沉淀,采用原子吸收法对置换出的铬元素进行测定,即可间接得到粉煤灰中硫化物的含量.试验结果表明,该方法的相对标准偏差在土5%之内,所得标准曲线的相关系数r=0.999 2,加标回收率为94%和105%,具有较高的准确度和精密度.实践表明,该方法在分析多个样品时更显其优越性.
開髮瞭一種測定固體樣品中硫化物的方法.採用高壓密封消化法處理火電廠粉煤灰,使硫化物轉變成硫痠鹽併與鉻痠鋇進行定量反應生成硫痠鋇沉澱,採用原子吸收法對置換齣的鉻元素進行測定,即可間接得到粉煤灰中硫化物的含量.試驗結果錶明,該方法的相對標準偏差在土5%之內,所得標準麯線的相關繫數r=0.999 2,加標迴收率為94%和105%,具有較高的準確度和精密度.實踐錶明,該方法在分析多箇樣品時更顯其優越性.
개발료일충측정고체양품중류화물적방법.채용고압밀봉소화법처리화전엄분매회,사류화물전변성류산염병여락산패진행정량반응생성류산패침정,채용원자흡수법대치환출적락원소진행측정,즉가간접득도분매회중류화물적함량.시험결과표명,해방법적상대표준편차재토5%지내,소득표준곡선적상관계수r=0.999 2,가표회수솔위94%화105%,구유교고적준학도화정밀도.실천표명,해방법재분석다개양품시경현기우월성.
A determination method of sulfide in solid samples has been developed. The fly ash from burning pulverized coal in thermal power plant is pretreated by using high-pressure sealed digestion method, making the sulfide to react quantitatively with the barium chromate, and then the excess atoms of barium is measured by using atom absorption method,thereby,the sulfide content in fly ash of pul-verized coal can be indirectly obtained. The results of test show that the relative standard deviation of this method is within ±5%, the corelation coefficient of the obtained standard curves being r=0. 999 2,the marked recovery rate being 94% and 105%,having higher precision. Practice shows that the superiority of this method will be even better in the event of analysing many samples.
