<p><font face="宋体"><span style="font-size: 10.5pt;">用硅钼蓝光度法测定水中活性硅时,在试给操作上应注意事项?</span><span lang="EN-US" style="font-size: 10.5pt; font-family: arial;"></span></font></p><font face="宋体"><span style="font-size: 10.5pt;"> 此方法一般测定的硅含量在50</span><span lang="EN-US" style="font-size: 10.5pt;">u</span><span style="font-size: 10.5pt;">ɡ</span></font><span lang="EN-US" style="font-size: 10.5pt; font-family: arial;">/L</span><span style="font-size: 10.5pt;"><font face="宋体">,超过此含量可以稀释,稀释的比例不能超过</font></span><span lang="EN-US" style="font-size: 10.5pt; font-family: arial;">10 </span><span style="font-size: 10.5pt;"><font face="宋体">倍。一般用除盐水、凝结水、给水、蒸汽等水样的含硅量的测定。当室温低于</font></span><span lang="EN-US" style="font-size: 10.5pt; font-family: arial;">2</span><font face="宋体"><span lang="EN-US" style="font-size: 10.5pt;">0</span><span style="font-size: 10.5pt;">℃时,应采用水浴加热至<span lang="EN-US">25</span>℃左右,<span lang="EN-US">1</span>,<span lang="EN-US">2</span>,<span lang="EN-US">4</span>酸是还原剂,在室温高时容易变质,存放期不宜超过两周。</span></font> |