Hi all,
Discussion in another thread concerning DOS prompted my interest in additives that reduce the risk of fatty acid oxidation and rancidity in soap.
http://cavemanchemistry.com/DreadedOrangeSpot-Dunn.pdf
This paper mentions different combinations including ROE +EDTA and BHT + Sodium Citrate. A few members use these strategies already (cmzaha, DeeAnna, Earlene, I believe?). However, it was published in 2006 and I am interested in not only reproducing Dr. Dunn's findings but also in testing out new antioxidants and chelators that may have been developed or have become more popular since publication.
Any experience with methods or materials would be greatly appreciated! I plan to send an email to Dr. Dunn with my setup to see if everything checks out. For now I would love to brainstorm with you all or here your experiences working with these agents in soap.
I. Method
I think I have two possible options.
1. I could reproduce the original study. I am just interested in the additives so I do not have to worry about the nitrogen vs oxygen tubes. I would use the standard soap recipe mentioned (Recipe #1) in the paper and my own recipe (20% SF) (Recipe #2). I would need an incubator, a scanner, a computer w/ free program download, disposable plastic pipettes, beaker holder, and the additives.
Study Design would be:
Recipe #1: Negative Control 1, Negative Control 2, Additive 1, Additive 2, Additive 3, etc.
Recipe #2: Negative Control 1, Negative Control 2, Additive 1, Additive 2, Additive 3, etc.
2. I could find a lab that has a rancimat machine and ask them if they will run samples for me for a fee. If anyone has one or knows a lab that does in the continental US, let me know!
II. Additives
** If you have others you have tried or are interested in learning more about, let me know! I am interested in "greener" antioxidants and chelators, with regards to their environmental impact and their label appeal.
Antioxidants
1. ROE
2. Tocopherols/Vitamin E
Chelators
1. EDTA
2. Sodium Citrate
3. Sodium Ascorbate
4. Sodium Gluconate (https://www.makingcosmetics.com/Sodium-Gluconate-USP_p_1103.html)
5. Tetrasodium Iminodisuccinate (Baypure CX 100)
- It says it can be used for cosmetic use but I can't find much info about it
6. Sorbitol??
- No idea this had chelating abilities in alkaline conditions. My question is, how alkaline does it need to be for it to chelate?
Combinations
3. ROE + EDTA
4. ROE + Sodium Citrate
- It performed worse the first time, I am interested in rechecking this
5. Ascorbic Acid (ascorbate as chelator) + ROE + Tocopherols (http://www.theherbarie.com/Antioxidant-Synergy-Blend-ASB.html)
6. ROE + Sodium Gluconate
Resources:
http://www.subsport.eu/wp-content/u..._ions_removal_from_different_waste_waters.pdf
https://onlinelibrary.wiley.com/doi/pdf/10.1002/9783527628698.hgc104
(^ anyone have access to this article? Woudl lvoe to read it)
https://www.alliedmarketresearch.com/green-chelating-agent-market
Discussion in another thread concerning DOS prompted my interest in additives that reduce the risk of fatty acid oxidation and rancidity in soap.
http://cavemanchemistry.com/DreadedOrangeSpot-Dunn.pdf
This paper mentions different combinations including ROE +EDTA and BHT + Sodium Citrate. A few members use these strategies already (cmzaha, DeeAnna, Earlene, I believe?). However, it was published in 2006 and I am interested in not only reproducing Dr. Dunn's findings but also in testing out new antioxidants and chelators that may have been developed or have become more popular since publication.
Any experience with methods or materials would be greatly appreciated! I plan to send an email to Dr. Dunn with my setup to see if everything checks out. For now I would love to brainstorm with you all or here your experiences working with these agents in soap.
I. Method
I think I have two possible options.
1. I could reproduce the original study. I am just interested in the additives so I do not have to worry about the nitrogen vs oxygen tubes. I would use the standard soap recipe mentioned (Recipe #1) in the paper and my own recipe (20% SF) (Recipe #2). I would need an incubator, a scanner, a computer w/ free program download, disposable plastic pipettes, beaker holder, and the additives.
Study Design would be:
Recipe #1: Negative Control 1, Negative Control 2, Additive 1, Additive 2, Additive 3, etc.
Recipe #2: Negative Control 1, Negative Control 2, Additive 1, Additive 2, Additive 3, etc.
2. I could find a lab that has a rancimat machine and ask them if they will run samples for me for a fee. If anyone has one or knows a lab that does in the continental US, let me know!
II. Additives
** If you have others you have tried or are interested in learning more about, let me know! I am interested in "greener" antioxidants and chelators, with regards to their environmental impact and their label appeal.
Antioxidants
1. ROE
2. Tocopherols/Vitamin E
Chelators
1. EDTA
2. Sodium Citrate
3. Sodium Ascorbate
4. Sodium Gluconate (https://www.makingcosmetics.com/Sodium-Gluconate-USP_p_1103.html)
5. Tetrasodium Iminodisuccinate (Baypure CX 100)
- It says it can be used for cosmetic use but I can't find much info about it
6. Sorbitol??
- No idea this had chelating abilities in alkaline conditions. My question is, how alkaline does it need to be for it to chelate?
Combinations
3. ROE + EDTA
4. ROE + Sodium Citrate
- It performed worse the first time, I am interested in rechecking this
5. Ascorbic Acid (ascorbate as chelator) + ROE + Tocopherols (http://www.theherbarie.com/Antioxidant-Synergy-Blend-ASB.html)
6. ROE + Sodium Gluconate
Resources:
http://www.subsport.eu/wp-content/u..._ions_removal_from_different_waste_waters.pdf
https://onlinelibrary.wiley.com/doi/pdf/10.1002/9783527628698.hgc104
(^ anyone have access to this article? Woudl lvoe to read it)
https://www.alliedmarketresearch.com/green-chelating-agent-market