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maintenance_ph [19/06/2019 14:04]
pieter [Cleaning]
maintenance_ph [19/06/2019 14:09]
pieter [Cleaning]
Line 24: Line 24:
 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.
-  * **proteinaceous ​materials (such as blood)**: the electrode should stand in a Pepsine cleaning solution ​ ​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. 
-  * **protein deposits**: soak the electrode in 1% pepsin in 0.1 M HCl (Consort article **B231**) ​for 15 minutes. This can be used after measurements in products such as **cheese**, **meat**, **blood**, ... The B231 solution can also be used as storage solution after use in these protein products to keep the electrode in optimum state+
   * **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.
maintenance_ph.txt · Last modified: 19/06/2019 14:09 by pieter