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Q甲基橙溶液Q?g/LQ称?.2g甲基(HG/T3-3089Q溶?00mL水中?</p> <p style="text-indent:2em;"> Q? Q铝_:分析U?</p> <p style="text-indent:2em;"> (10) 锌粉Q分析纯?</p> <p style="text-indent:2em;"> (11 )滤纸Q?慢速定性oU和慢速定量oU?</p> <p style="text-indent:2em;"> 3?煤中酸盐硫的测定A器设?</p> <p style="text-indent:2em;"> Q? Q分析天qI感量?.1mg?</p> <p style="text-indent:2em;"> (2 )马弗炉:能升温到900℃ƈ可调节温度,通风良好?</p> <p style="text-indent:2em;"> (3 )늃板或沙ʎQ温度可调?</p> <p style="text-indent:2em;"> (4 )烧杯Q容量(250 ~300QmL?</p> <p style="text-indent:2em;"> (5) 表面皿:直径100mm?</p> <p style="text-indent:2em;"> (6) 瓷坩埚:光滑Q容量(10 ~ 20QmL?</p> <p style="text-indent:2em;"> 4 、测定步?</p> <p style="text-indent:2em;"> (1) 准确U取_度于0.2mm的空气干燥煤?(1u0.1)gQ称准到0.0002gQ? 攑օ烧杯(3.3.4)中,加入Q?.5?QmL乙醇Q?.2.7Q润湿,然后加入50mL盐酸溶液Q?.2.1Q,盖上表面皿(3.3.5Q,摇匀Q在늃板上加热Q微?0min?</p> <p style="text-indent:2em;"> (2) E冷后,先用倾泻法通过慢速定性oU过滤,用热水洗煤样数次Q然后将煤样全部转移到oU怸Qƈ用热水洗到无铁离子ؓ止[用硫氰酸钾溶Ԍ3.2.5Q检?如溶液无?说明无铁d]。过滤时如有煤粉I过滤纸Q则重新qoQ如滤液呈黄Ԍ需加入0.1g铝粉Q?.2.9Q或锌粉Q?.2.10Q,微热佉K色消失后再过滤,用水z到无氯d为止[用硝酔R溶液Q?.2.6Q检?如溶液不浊Q说明无氯离子]。过滤毕Q将煤样与oU怸起叠好后攑օ原烧杯中Q供定化铁硫用?</p> <p style="text-indent:2em;"> (3 )向o液中加入(2~3)滴甲基橙指示剂(3.2.8Q,用}_3.2.2Q中和至微碱性(溶液呈黄ԌQ再加盐酸调x液成微酸性(溶液呈红ԌQ再q量2mLQ加热到沸腾Q在不断搅拌下滴?0%氯化钡溶Ԍ3.2.3Q?0 mLQ放在电热板上或沙ʎ上微?h或放|过夜,*后保持溶液的体积?00mL左右?</p> <p style="text-indent:2em;"> (4) 用慢速定量oU过滤,q用热水z到无氯d为止?</p> <p style="text-indent:2em;"> (5 )沉淀q同滤纸Ud已恒重的瓷坩埚中Q先在低温下灰化滤纸Q然后在温度(800?50)℃马弗炉中灼?0min。取出坩埚,在空气中E稍冷却后,攑օq燥器中冷却臛_温,U量?</p> <p style="text-indent:2em;"> (6 )按照3.4.1?.4.5规定的步?不加煤样)Q进行空白测定,取两ơ测定的q_g为空白?</p> <p style="text-indent:2em;"> <br /> </p> </div> <div class="relatv"> <p class="uppage"> <div>上一?<a href="148.html">全自动量热A氧弹使用前的?/a></div> <div>下一?<a href="146.html">煤的高温燃烧中和法定测?/a></div> </p> </div> </div> <div class="tag"> ♥ 相关标签Q?a href='/key.aspx?k=%e7%85%a4%e7%82%ad%e9%87%8f%e7%83%ad%e4%bb%aa'>煤炭量热?/a>,</div> <div class="rtt"> •相关新闻</div> <hr /> <div class="infons"> <ul> <li><a href="/news/151.html" title='高精度量热Al护保养规章制度' rel="nofollow" target="_blank">高精度量热Al护保养规章制度</a> </li> <li><a href="/news/150.html" title='煤质化验讑֤应用煤炭发热? rel="nofollow" target="_blank">煤质化验讑֤应用煤炭发热?/a> </li> <li><a href="/news/147.html" title='煤中酸盐硫的测? rel="nofollow" target="_blank">煤中酸盐硫的测?/a> </li> <li><a href="/news/146.html" title='煤的高温燃烧中和法定测? rel="nofollow" target="_blank">煤的高温燃烧中和法定测?/a> </li> <li><a href="/news/120.html" title='煤炭热量的仪器—煤炭热卡化验设? rel="nofollow" target="_blank">煤炭热量的仪器—煤炭热卡化验设?/a> </li> </ul> </div> <div class="rtt"> •相关产品 </div> <hr /> <div class="infopro"> <ul> </ul> </div> </div> </div> </div> </div> <div id="footer"> <div class="foot"> <p style="margin:10px 0; 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