正确的处理和护理pH米
所有实验室都可以看到pH计，而不管尺寸 - 学校实验室学院实验室，大学研究实验室，商业产品检测实验室，工业实验室甚至国家一级实验室都可以看出。
A laboratory may not be equipped with sophisticated instruments such as AAS,GC,HPLC, LC – MS or FT – IR but it simply cannot do without a pH meter as pH measurement is a basic requirement for all chemical and biochemical reactions and process control reactions in manufacturing industries.
即使在规定的酸度方面略有变化也可以改变反应过程或导致制造损失。然而，简单的pH计通常被视为理所当然，其适当的处理和护理被忽视。
In this article I have tried to provide some valuable tips on proper handling and care of a pH meter that will ensure correct pH reading every time you make use of it :
- A pH electrode is fragile and one should not be tempted to use it as a stirring glass rod when adjusting pH.
- A pH meter needs to be calibrated daily with the help of standard buffer solutions.
- 由于玻璃电极电阻的变化，pH读数是温度敏感的。每30°C的抗性导致10倍折叠释放的温度。避免温度波动，永不保持暴露在阳光下暴露的pH米。
- 当玻璃膜脱水时，玻璃电极不应留出储存溶液的延长间隔，导致较慢的响应，并且最终可能导致完全应答失效。电极不应浸入脱水溶液如硫酸和乙醇中。
- Glass is rapidly attacked by hydrofluoric acid so never keep the electrode in HF solution as it can lead to irreparable damage of the electrode.
- 避免振动和休克。当使用磁力搅拌器时注意，在仪表灯泡和磁力搅拌器颗粒之间保持足够的距离，以防止意外断裂。不应使用加热的磁力搅拌器，因为它可以引起溶液温度的变化。
- 在实验室间或实验室间运输过程中仔细处理以防止破损。
- 在环境温度为10°C至30°C的环境温度下存储传感器。保护帽以及供应商提供的解决方案储存帽应在不使用时安装到传感器的末端。理想情况下，传感器应存储在3至3.5米的KCl溶液中。保持支票以确保存储解决方案没有蒸发。
- Adopt the suggested cleaning procedures after use:
- General cleaning – if the solutions are fairly clean soak in 0.1M HCL or 0.1M HNO3for about 30 minutes
- 细菌或沉积物 - 浸泡在1：10稀释衣物漂白剂10分钟
- Oil or grease – soak in detergent or methanol
- Protein deposits – soak in 1% pepsin in 0.1 M HCl for 5 min.
After every soaking the electrode should be rinsed with distilled water. Droplets adhering to electrode should be gently dried with tissue paper and not rubbed or wiped.
Further reading
Useful reference and guide on fundamentals and applications of pH measurements:
什么是pH值，以及如何测量 - 工业技术手册。
http://extension.psu.edu/food/entrepreneurs/technology/acidified-foods/phmeasure.pdf/view
The above guideline will help you obtain accurate and repeatable pH readings. We welcome your views and suggestions based on your experiences.
i.m new user to atomi absorpance spectroscopy what your adviser for me ,, from start to understand the machine
最好的问候
您应该首先了解基础知识并理解各个组件。我希望你已经通过了博客中出现的AAS上的模块。主题涵盖了您所提出的所有方面，并将帮助您了解更好的理解。在案例中仍有任何疑问，请随时提高它们。
Regards
my Dr. Deepak Bhanot
could you please to explain why the read appear uncal or over when analyse sodium element by flame , mention method we use st 1.5-1-.5ppm and concentration sample in d.w 1g/100ml
thanks
Dear Sabri,
In the topic I have covered handling and care of pH meter but from your comment it appears that you have mixed it up with elemental analysis.I am not clear on the query raise by you.
Regards
感谢您的有用信息。现在我们更加了解如何维护电极
你好,很高兴听到你找到我们的信息eful.
Regards
Good article
Hi Sriram,
Thanks for the appreciation.please do let us know if you have any suggestions.
Regards
[...]极性和可电离化合物的相分离需要使用缓冲剂精确控制pH。这确保了可重复的保留时间和峰值的自由度[...]
亲爱的Bhanot，
非常有信息的文章，涵盖了简单的pH测量中涉及的基础和复杂性。
Regards
Sharma
谢谢哈拉罕德拉博士。我们很高兴地注意到所提供的信息很有意思和有用。您的反馈旨在激励我们。
Dear Deepak Sir,
Very nice and useful article from U.
Thanks a lot.
问候，
Jamal
Thanks Jamal. Nice to know that you found the content useful and informative
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why do I get a lower ph reading when the stirrer is at rest and a higher one when it’s running?
It depends on the nature of your sample. Can you let me know what the sample was?
nice information..