全自动冰点渗透压计原理及参数简介

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                    <section><section powered-by="gulangu"><section><section><p><img src="image/20201019/d1818eeac3af55dddebadbda24a8c875_1.gif" /></p></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section><section powered-by="gulangu"><section><section><p>临床运用</p></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; 冰点渗透压计是用于测定溶液晶体渗透压或渗透压摩尔浓度（Osmolality）的仪器。在医学临床上，测定血清或血浆、尿液、胃液、脑脊液、唾液、汗液以及各种代血浆、注射液、透析液、婴儿饮料、电镜固定液、组织细胞培养液和保存液等溶液的渗透压。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 对于研究水盐代谢平衡、评价肾功能紊乱、监护糖尿病、观察ADH内分泌失调、了解创伤、烧伤、休克、大手术后等外科危急病情的变化以及人工透析、输液疗法的监护和药物（尤其对中草药）的药理分析等，都有着重大意义。</p></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section><section powered-by="gulangu"><section><section><p>设备原理</p></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;冰点渗透压计的工作原理是以冰点下降值与溶液的摩尔溶度成正比例关系为基础。采用高灵敏度的感温元件-半导体测量传感器测量溶液的结冰点，通过电量转化为渗透压单位（m0sm/kg）而实现。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 被测样品的试管置于半导体制冷器中，由不冻液作为传导媒介，使试管内的溶液冷却，半导体制冷器的吸热侧吸收不冻液的热量使其降温，发热侧由散热风机冷却</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 被测样品的温度变化过程如下：</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 冰点是指溶液从液态变为固态的温度，对于水溶液，从液态向固态冷却变化过程中，温度虽已达结冰点，甚至已超过结冰温度而不发生结冰的现象称之为“过冷现象”。处于过冷状态下的液态是极不稳定的，任一扰动便可引起其立刻结晶而变为固态。液体变为固态时，由于分子能量突然由高能态变低能态，多余的能量就会以热的形式释放出来，称之为“晶化热”。由于晶化热的存在，将使过冷的溶液在结冰形成的瞬间产生温度回升现象。上述过程，可以用以下“结冰曲线”来描述。</p></section></section></section><section powered-by="gulangu"><section><section><p><img src="image/20201019/4560f3fed0282a25145b5ed0134cc999_2.jpg" /></p></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;图中A点为溶液开始冷却，B点为过冷温度点，C点为溶液起始结冰温度点，CD段为冰点温度稳定时相，DE段为固态下继续冷却。</p><p>&nbsp; &nbsp; &nbsp; &nbsp; 鉴于溶液的渗透溶度或渗透压值与其冰点下降成线性关系，只要将所得的溶液的冰点温度值除以1.857，即可得到该溶液的渗透压数值。</p></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section><section powered-by="gulangu"><section><section><p>基本参数</p></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p>1、测量范围</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;（0~2000）m0sm/kg</p><p>2、测量基本误差&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ≤300m0sm/kg&nbsp; &nbsp; 不大于±3m0sm/kg</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;＞300m0sm/kg&nbsp; &nbsp; &nbsp;不大于1%</p><p>3、重复误差（CV）&nbsp;&nbsp;</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;不大于1%</p><p>4、样品量</p><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; 0.5ml</p><p>注：渗透溶度OS的单位，在医学临床上是用“m0smol/kg”,（即毫渗摩尔/千克，0smol/kg的千分之一），简称毫渗量/千克。</p></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section><section powered-by="gulangu"><section><section><p>使用耗材目录</p></section></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p>&nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp;该设备使用5种耗材，分别为不冻液、0.5ml试管、300mosm/kg定标液、800mosm/kg、热敏打印纸。</p><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p>欢</p></section></section></section></section><section><section powered-by="gulangu"><section><section><p>迎</p></section></section></section></section><section><section powered-by="gulangu"><section><section><p>关</p></section></section></section></section><section><section powered-by="gulangu"><section><section><p>注</p></section></section></section></section></section></section><section powered-by="gulangu"><section><section><p><br  /></p></section></section></section><section powered-by="gulangu"><section><section><section powered-by="gulangu"><section><section><p><img src="image/20201019/9ed60fc650fa31899e131c8a895bf74a_3.jpg" /></p></section></section></section></section><section><section powered-by="gulangu"><section><section></section></section></section></section><section><section powered-by="gulangu"><section><section><p>关注我们</p><p>一起涨姿势！</p></section></section></section></section></section></section></section>