酸度计电计

本文章主要介绍了：酸度计电计,phs25酸度计注意问题,phs-3c酸度计确认,酸度计电计等信息

g）用蒸馏水及被测溶液清洗电极后即可对被测溶液进行测量。
如果在标定过程中操作失误或按键按错而使仪器测量不正常，可关闭电源，然后按住“确认”键后再开启电源，使仪器恢复初始状态。然后重新标定。
注意：经标定后,如果误按“标定”键或“温度”键，则可将电源关掉后重新开机，仪器将恢复到原来的测量状态。
注：标定的缓冲溶液一般第一次用pH=6.86的溶液，第二次用接近被测溶液pH值的缓冲液，如被测溶液为酸性时，缓冲溶液应选pH=4.00；如被测溶液为碱性时则选pH=9.18的缓冲溶液。
一般情况下，在24h内仪器不需再标定。
三、测量pH值
(酸度计 电计)

7.电极经长期使用，或被测溶液中含有易污染敏感玻璃球泡或堵塞液接界的物质，而使电极钝化，其现象是敏感梯度降低，响应缓慢，读数不准，可根据不同情况采取下列措施：
（a）玻璃球泡污染老化：将电极用0.1mol/L稀盐酸（配制：9mL盐酸用纯水稀释至1000mL）浸泡24h，用纯水洗净，然后再用电极浸泡液浸泡24h，如果钝化比较严重，也可将电极下端浸泡在4%HF（氢氟酸）中（3~5）s，用纯水洗净，然后在电极浸泡液中浸泡24h，使之复新。
（b）玻璃球泡和液接界污染的清洗：（供参考）
污染物清洗剂
无机金属氧化物低于1mol/L稀酸
有机油脂类物稀洗涤剂（弱碱性）
(酸度计 电计)

PH计电极的选择：
pH电极的测量结果主要取决于两大关键部件：玻璃球泡(即pH敏感膜)和液络部，pH电极斜率、响应时间和测量误差等性能通常由此两项部件的结构、材料及加工工艺决定。
(酸度计 电计)

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