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<meta name="Description" content="依据2021年开始实施的规范：《SL/T 352 – 2020 水工混凝土试验规程》 ，用于测定细骨料或粗骨料中硫酸盐、硫化物的总含量，我公司推出本产品 。  ​ 仪器设备及试剂应包括以下几种。" />
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                <p style="margin-left: 28px;line-height: 150%"><span style="font-family:宋体;font-weight:bold;font-size:21px">&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">依据</span><span style="font-family:Times New Roman">2</span></span><span style=";font-family:&#39;Times New Roman&#39;;font-size:16px">021</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">年开始实施的规范：</span></span><strong><span style="font-family: 宋体;font-size: 16px"><span style="font-family:宋体">《</span><span style="font-family:Times New Roman">S</span></span></strong><strong><span style="font-family: &#39;Times New Roman&#39;;font-size: 16px">L/T 352 – 2020 </span></strong><strong><span style="font-family: 宋体;font-size: 16px"><span style="font-family:宋体">水工混凝土试验规程》</span></span></strong><span style=";font-family:宋体;font-size:16px">&nbsp;<span style="font-family:宋体">，用于测定细骨料或粗骨料中硫酸盐、硫化物的总含量，我公司推出本产品</span> 。</span></p><p style="margin-left: 28px;line-height: 150%"><span style="font-family:宋体;font-weight:bold;font-size:21px">&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">仪器设备及试剂应包括以下几种。</span></span></p><p style="margin-left: 66px;line-height: 150%"><span style="font-family:宋体;font-size:16px">1.&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">仪器设备应包括以下几种。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">1)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">天平：分度值不大于</span> <span style="font-family:Times New Roman">0.1g </span><span style="font-family:宋体">一台，分度值不大于 </span><span style="font-family:Times New Roman">0.01g </span><span style="font-family:宋体">一台。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">2)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">分析天平：分度值不大于</span> <span style="font-family:Times New Roman">0.1mg</span><span style="font-family:宋体">。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">3)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">高温炉：可控温度不低于</span> <span style="font-family:Times New Roman">1000</span><span style="font-family:宋体">℃。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">4)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">烘箱：控制温度（</span><span style="font-family:Times New Roman">105</span><span style="font-family:宋体">±</span><span style="font-family:Times New Roman">5</span><span style="font-family:宋体">）℃。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">5)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">试验筛：筛孔尺寸</span> <span style="font-family:Times New Roman">20mm</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">0</span></span><span style=";font-family:&#39;Times New Roman&#39;;font-size:16px">.160mm</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">0.08mm </span><span style="font-family:宋体">的方孔筛。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">6)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">辅助器具：振荡器或滚筒、烧瓶、加塞圆底烧瓶、过滤漏斗、冷凝管、移液管、烧杯、瓷坩埚、搅拌器、电炉、中速滤纸、慢速定量滤纸、玻璃棒、氮气或氩气瓶等。</span></span></p><p style="margin-left: 66px;line-height: 150%"><span style="font-family:宋体;font-size:16px">2.&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">试剂应包括以下几种。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">1)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:Times New Roman">10%</span><span style="font-family:宋体">氯化钡溶液：称出 </span><span style="font-family:Times New Roman">10 </span><span style="font-family:宋体">克氯化钡溶解于 </span><span style="font-family:Times New Roman">100mL </span><span style="font-family:宋体">蒸馏水中制备。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">2)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">盐酸溶液（</span><span style="font-family:Times New Roman">1:1</span><span style="font-family:宋体">）：由浓盐酸溶于同体积的蒸馏水中制备。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">3)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">硝酸银溶液：称出</span> <span style="font-family:Times New Roman">1g </span><span style="font-family:宋体">硝酸银，溶解于 </span><span style="font-family:Times New Roman">100mL </span><span style="font-family:宋体">蒸馏水中后，缓慢加入</span><span style="font-family:Times New Roman">5</span><span style="font-family:宋体">～</span><span style="font-family:Times New Roman">10mL </span><span style="font-family:宋体">的硝酸（密度为 </span><span style="font-family:Times New Roman">1.42kg/L</span><span style="font-family:宋体">），存放于棕色试剂瓶内。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">4)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">硫酸锌的氨溶液：称出</span> <span style="font-family:Times New Roman">50 </span><span style="font-family:宋体">克硫酸锌（</span><span style="font-family:Times New Roman">ZnSO4 .7H2O</span><span style="font-family:宋体">）溶解于 </span><span style="font-family:Times New Roman">150mL </span><span style="font-family:宋体">蒸馏水中，加入 </span><span style="font-family:Times New Roman">350mL </span><span style="font-family:宋体">浓氨水（</span><span style="font-family:Times New Roman">NH4OH</span><span style="font-family:宋体">），静置 </span><span style="font-family:Times New Roman">24h </span><span style="font-family:宋体">后用中速滤纸过滤；</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">5)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">醋酸铅溶液：称出</span> <span style="font-family:Times New Roman">0.2 </span><span style="font-family:宋体">克醋酸铅溶解于 </span><span style="font-family:Times New Roman">100mL </span><span style="font-family:宋体">蒸馏水中制备。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">6)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">标准碘酸钾溶液（</span><span style="font-family:Times New Roman">0.01667mol/L</span><span style="font-family:宋体">）：称出 </span><span style="font-family:Times New Roman">110</span><span style="font-family:宋体">℃烘干的（</span><span style="font-family:Times New Roman">3.6</span><span style="font-family:宋体">±</span><span style="font-family:Times New Roman">0.1</span><span style="font-family:宋体">）</span><span style="font-family:Times New Roman">g</span><span style="font-family:宋体">（精确到 </span><span style="font-family:Times New Roman">0.1mg</span><span style="font-family:宋体">）碘酸钾（</span><span style="font-family:Times New Roman">KIO3 </span><span style="font-family:宋体">）、</span><span style="font-family:Times New Roman">0.4g </span><span style="font-family:宋体">氢氧化钠（</span><span style="font-family:Times New Roman">NaOH</span><span style="font-family:宋体">）和 </span><span style="font-family:Times New Roman">25g </span><span style="font-family:宋体">碘化钾（</span><span style="font-family:Times New Roman">KI</span><span style="font-family:宋体">），放入 </span><span style="font-family:Times New Roman">1L </span><span style="font-family:宋体">容量瓶中，加入新煮沸过的冷水至标线（微量氢氧化钠有助于溶液保持稳定，如溶液褪色应抛弃）。标准碘酸钾溶液系数 </span><span style="font-family:Times New Roman">F </span><span style="font-family:宋体">按照下方公式计算：</span></span></p><p style="line-height: 150%"><img width="217" height="41" src="http://www.tjsyyq.com/lib/ueditor/themes/default/images/spacer.gif" word_img="file:///C:\Users\ADMINI~1\AppData\Local\Temp\ksohtml\wps3493.tmp.jpg" style="background:url(http://www.tjsyyq.com/lib/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd"/><span style=";font-family:&#39;Times New Roman&#39;;line-height:150%;font-size:16px">&nbsp;</span></p><p style="margin-left: 84px;text-indent: 10px;line-height: 150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">式中</span> <span style="font-family:Times New Roman">m 1 </span><span style="font-family:宋体">——碘酸钾的质量，单位</span><span style="font-family:Times New Roman">g</span><span style="font-family:宋体">。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">7)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">硫代硫酸钠溶液（</span><span style="font-family:Times New Roman">0.1mol/L</span><span style="font-family:宋体">）：称出 </span><span style="font-family:Times New Roman">24.82 </span><span style="font-family:宋体">克硫代硫酸钠（</span><span style="font-family:Times New Roman">Na2S2O3</span><span style="font-family:宋体">·</span><span style="font-family:Times New Roman">5H2O</span><span style="font-family:宋体">）溶解于 </span><span style="font-family:Times New Roman">1L </span><span style="font-family:宋体">蒸馏水中制备。硫代硫酸钠溶液系数 </span><span style="font-family:Times New Roman">f </span><span style="font-family:宋体">按照下述方法测定。</span></span></p><p style="margin-left: 122px;line-height: 150%"><span style="font-family:宋体;font-size:16px">a)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">用移液管将</span> <span style="font-family:Times New Roman">20mL </span><span style="font-family:宋体">碘酸钾溶液放入 </span><span style="font-family:Times New Roman">500mL </span><span style="font-family:宋体">锥形瓶，注入 </span><span style="font-family:Times New Roman">150mL </span><span style="font-family:宋体">稀释，加入 </span><span style="font-family:Times New Roman">25mL </span><span style="font-family:宋体">盐酸溶液（</span><span style="font-family:Times New Roman">1:1</span><span style="font-family:宋体">）酸化，用 </span><span style="font-family:Times New Roman">0.1mol/L </span><span style="font-family:宋体">硫代硫酸钠溶液滴定至淡黄色。</span></span></p><p style="margin-left: 122px;line-height: 150%"><span style="font-family:宋体;font-size:16px">b)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">加入</span> <span style="font-family:Times New Roman">2mL </span><span style="font-family:宋体">淀粉溶液，继续滴定直至蓝色变成无色。</span></span></p><p style="margin-left: 122px;line-height: 150%"><span style="font-family:宋体;font-size:16px">c)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">硫代硫酸钠溶液系数</span> <span style="font-family:Times New Roman">f </span><span style="font-family:宋体">按照下方公式计算：</span></span></p><p style="line-height: 150%"><img width="276" height="41" src="http://www.tjsyyq.com/lib/ueditor/themes/default/images/spacer.gif" word_img="file:///C:\Users\ADMINI~1\AppData\Local\Temp\ksohtml\wps34A3.tmp.jpg" style="background:url(http://www.tjsyyq.com/lib/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd"/><span style=";font-family:&#39;Times New Roman&#39;;line-height:150%;font-size:16px">&nbsp;</span></p><p style="margin-left: 84px;text-indent: 28px;line-height: 150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:宋体">式中</span> <span style="font-family:Times New Roman">F </span><span style="font-family:宋体">—— 标准碘酸钾溶液系数；</span></span></p><p style="margin-left: 140px;line-height: 150%"><span style=";font-family:宋体;line-height:150%;font-size:16px"><span style="font-family:Times New Roman">V</span></span><span style=";font-family:&#39;Times New Roman&#39;;line-height:150%;font-size:16px">S</span><span style=";font-family:宋体;line-height:150%;font-size:16px">&nbsp;<span style="font-family:宋体">—— </span><span style="font-family:Times New Roman">0.1mol/L </span><span style="font-family:宋体">硫代硫酸钠溶液滴定用量，单位</span><span style="font-family:Times New Roman">mL</span><span style="font-family:宋体">。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">8)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">淀粉溶液：称出</span><span style="font-family:Times New Roman">1g</span><span style="font-family:宋体">水溶性淀粉、</span><span style="font-family:Times New Roman">1g</span><span style="font-family:宋体">碘化钾（</span><span style="font-family:Times New Roman">KI</span><span style="font-family:宋体">），溶解于</span><span style="font-family:Times New Roman">100mL</span><span style="font-family:宋体">蒸馏水中制备。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">9)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">浓盐酸。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">10)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:Times New Roman">II </span><span style="font-family:宋体">价氯化锡（</span><span style="font-family:Times New Roman">SnCl2</span><span style="font-family:宋体">·</span><span style="font-family:Times New Roman">2H2O</span><span style="font-family:宋体">）。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">11)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">铬，粉状。</span></span></p><p style="margin-left: 75px;line-height: 150%"><span style="font-family:宋体;font-size:16px">12)&nbsp;</span><span style=";font-family:宋体;font-size:16px"><span style="font-family:宋体">去离子水。</span></span></p><p><br/></p>
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