-
Sodium citrate buffer
Hello. I’ve created a buffer solution with sodium citrate, citric acid and sodium hydroxide. My buffer pH is 5.4. I want to include it in a clarifying shampoo that should have a final pH of about 5.3-5.4. I found a site that does the calculations for you, so I used:
Aqua— 100ml
Sodium citrate— 4.813g
Citric acid— 1.659g
Sodium hydroxide—Qs to pH, 0.36g
Citric acid —0.16g because my ph was then a bit too high so I added a bit more
Aqua— Qs to total 250ml
But now what I want to know is when do I add the buffer? Do I do it at the end after I’ve adjusted the final pH or some time before? Note, I do hydrate cationic guar at the end (5.0-5.5), as well as do some heating to 70*C. Please lmk what you can suggest. TIA
-
1 Reply
-
Also, how much should I use in percentage or grams? I see some things that say as low as 0.1% to 5% and that’s a very wide range.
Log in to reply.