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<span style="font-family:宋體">樣品中的鈣、鎂離子與指示劑生成一種紅色化合物，再通過自動(dòng)移液管向上述混合液中加入含有</span>pH<span style="font-family:宋體">值為</span>11<span style="font-family:宋體">緩沖劑和絡(luò)合滴定劑</span>EDTA<span style="font-family:宋體">的溶液</span>(R2)<span style="font-family:宋體">，</span>EDTA<span style="font-family:宋體">會(huì)與鈣、鎂離子結(jié)合成鰲合</span> <span style="font-family:宋體">物，使指示劑被釋放出來，使混合溶液顯藍(lán)色。該混合物再由自動(dòng)移液管送入帶有比色計(jì)的檢測(cè)器，在</span>520nm<span style="font-family:宋體">下測(cè)定吸光度，根據(jù)事先所做的標(biāo)準(zhǔn)曲線計(jì)算出水樣的硬度值。</span></p><p><strong><span style="font-family:宋體"> 軟化水設(shè)備</span> </strong><strong><span style="font-family:宋體">水處理裝置</span></strong></p> </div> <div id="8gliehdtukdw" class="ly_PrevNext"> <ul> <li>上一篇：<a href="/szhcy-Article-1964754/">通用型儀表在污水處理廠的使用</a></li> <li>下一篇：<a href="/szhcy-Article-1963780/">在線PH計(jì)的性能特點(diǎn)</a></li> </ul> </div> </div>   <div id="8gliehdtukdw" class="foot_box"> <div id="8gliehdtukdw" class="foot_t"> <div id="8gliehdtukdw" class="w1200"> <a 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