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maintenance_ph [19/06/2019 14:09]
pieter [Cleaning] 		maintenance_ph [19/06/2019 14:09]
pieter [Cleaning]
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 Depending on the possible contaminants, use the guide below to choose the appropriate solution: Depending on the possible contaminants, use the guide below to choose the appropriate solution:
-  * **stuborn deposits and bacterial growth**: soak the electrode in a 1:10 dilution of household laundry bleach for 15 minutes. +  * **Stuborn deposits and bacterial growth**: soak the electrode in a 1:10 dilution of household laundry bleach for 15 minutes. 
-  * **protein-containing materials/deposits (cheese, meat, blood, ...)**: the electrode should stand in a Pepsine cleaning solution 1% pepsin in 0.01 M to 0.1 M HCl (Consort article **B231**) overnight and then be cleaned with distilled water before use.  +  * **Protein-containing materials/deposits (cheese, meat, blood, ...)**: the electrode should stand in a Pepsine cleaning solution 1% pepsin in 0.01 M to 0.1 M HCl (Consort article **B231**) overnight and then be cleaned with distilled water before use.  
-  * **inorganic deposits**: soak the electrode in 0.1 M tetra sodium EDTA for 15 minutes. +  * **Inorganic deposits**: soak the electrode in 0.1 M tetra sodium EDTA for 15 minutes. 
-  * **oil and grease**: rinse the electrode with mild detergent (B530) or methanol. +  * **Oil and grease**: rinse the electrode with mild detergent (B530) or methanol. 
-  * **salt deposits**: dissolve the deposit by immersing the electrode in 0.1 M HCl for five minutes, followed by immersion in 0.1M NaOH for five minutes, and thorough rinsing with distilled water.+  * **Salt deposits**: dissolve the deposit by immersing the electrode in 0.1 M HCl for five minutes, followed by immersion in 0.1M NaOH for five minutes, and thorough rinsing with distilled water.
   * **Sulfides**: Sulfides react with the Ag from the reference electrode and solution. This forms dark deposits at the diaphragm of the reference electrode. Clean your electrode regularly with Thiourea to prevent blocking of the diaphragm.   * **Sulfides**: Sulfides react with the Ag from the reference electrode and solution. This forms dark deposits at the diaphragm of the reference electrode. Clean your electrode regularly with Thiourea to prevent blocking of the diaphragm.
  
maintenance_ph.txt · Last modified: 19/06/2019 14:09 by pieter

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