nasrins
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- nasrins
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Comments
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it doesnt have email?
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I have method but for max 5 ppm for shampoos which is the range in my country is not applicable.and I can not extract this concentration of 1,4 dioxane
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I guess this is out of this site
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but I am involved in formulation too
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john I am in an analytical lab, that one of my job is to determine 1,4dioxane in cosmetic products to report several and several cosmetic brands data sheet to standard lab to get approval of importing those brands. ok?
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@Bobzchemist you are completly confusing the subject of discussion. :)
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OK then how u analyse powdery essence? I mean you solve in which solvent that you be sure all ingredients are solved? and then u analyze it by GC
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@johnb sorry do u have any experence in analysing essence? i mean GC chromaography
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THIS IS NOT NEGATIVE RESPONSE
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:(
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@johnb there are several methods which of them is ok?
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and it seems there is no analytical chemist here, ya?
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behentrimonium chloride is far more better than cetromonium
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my aim is to determine 1,4 dioxane in shampoo. i solve sample in water and detrmine by GC chromatography. but i want to be sure that all 1,4 dioxane is extracted to water.
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@Bobzchemist how you extract 1,4 dioxane?
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maybe waxes cause by making them heavy...
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oh oh xantham gum... it really get bad smelling in few days... absolutly comparing to carbomer cellulose derivatives need more powerful preservatives...
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oh oh xantham gum... it really get bad smelling in few days... absolutly comparing to carbomer cellulose derivatives need more powerful preservatives...
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uhumm.. what about determination the concentation of some actives?
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thanks perry and david....
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HEDP, NTMP, NTA, APCAs are some alternatives... http://www.google.com/url?sa=t&rct=j&q=&esrc=s&source=web&cd=2&cad=rja&uact=8&ved=0CCYQFjAB&url=http%3A%2F%2Fwww.intechopen.com%2Fdownload%2Fpdf%2F20357&ei=6yfGV…
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I have a suggestion, plz when you are writing use simple words, so it fully will be undrestandable for non native english members :D
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for stability tests: oven(really important part)/refrigerator/ pHmeter(even u can use litmus paper if u really want to save money)/ brookfield viscometer( I think it isnt necessary except in special condition)/
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I think the most cost effective is buying tools to operate ur tests if u want do it regulary.
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thank you too, I really learn more and more via this website...and I thanks every body who answer questions patiently..and apologize if I bother some one...
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HCl and NaOH acts like salts with carbomer? I mean carbomer is just stable in neutrolize media, very acidic or alkalin media damage carbomer structure?
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@milliachemist I still have problem why carbomer is incompatible with salts...
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@markbroussard why preservatives are inactive at pH above 6?
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so just piroctin olamine is left
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do we have types of denatured? I didnt know...here I just buy denatured alcohol and dont care which percentages of bitrex or any other material it has
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