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名称
库伦电量法卡尔费休试剂(无隔膜)
分子类型
未知
别名
库仑法卡氏试液
英文名称
Coulometric Karl Fischer Reagent (none diaphragm)
货号
K293422-500ml
包装规格
500ml
浓度
含吡啶,1.5gH2O/100ml,阴阳极通用
储存温度
干燥
运输条件
常规运输
产品介绍
使用方法 加入试剂:5ml加入阴极池,约100ml加入阳极池,使二液面相平,检测同阴阳极液检测方法。 调起始平衡点:用微量注射器,逐渐加入少量纯水使其颜色由深棕色变成浅黄色直至达到平衡点。如果不是初次使用,开机后可自动调节平衡点。 进样:进样时,进样器针头要伸到液面以下。 终点:经过反应,达到终点,可测知样品中水的含量。 注意事项 1.如何能更快达到初始平衡点 在换电解液前,需洗净电解池并使之彻底干燥。 加水调平衡点时,需细心控制加水量和速度以免水过量。 水加入过量或电解液中碘离子含量过高时,可用中和液调到过碘,再用微量水重调到平衡点。 2.为什么有时很难达到反应终点 电解液失效 电解池密封性不好 电解池壁上可能有残余水分 电解池中的测量电极被污染而没及时清洗。 3.关于试剂的失效 如果试剂较长时间不能使电解反应达到终点,有可能失效。 电解液颜色变浅并不说明失效,这可能因为电解液吸收水分将I2大部分变成了I-,通过调初始平衡点或加中和液仍可使用,实际上100ml电解液可与1.5g水反应。 4.保存 1.该类试剂必须放置在干燥,阴凉处保存,避免太阳直晒,一瓶打开使用后,应封好盖,较好放在干燥器中保存,以免吸潮降低F值,不利进一步使用。 2.该类试剂不能食用,远离明火。
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electricamountmethodcard reagent(anhydrous) 500ml

item number:K293422-500ml
Product model:500ml
level: containingpyridine, 1. 5gH2O/100ml, for
Lead Time:30days
sold 521 Items
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500ml

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