Making artificial sweat

I'm currently working on a chemistry investigation wherein I need to dilute a compound with artificial sweat. I have looked at various forums, including [this](https://www.finishing.com/310/79.shtml), which gave answers, but is very outdated.


I have also checked on ISOs standards, but it seems that I cannot get the information I want - ISO 105-E04 - without paying a huge sum.


Do any of you know of a recipe for artificial sweat that I can easily conjure in a lab, that's also backed up by various sources?


Thanks


P.S. I *cannot* just use water + salt, as that would be too simple and cause too many uncertainties for my experiment.




The international standard ISO 105-E01:2013 *Textiles* – *Tests for colour fastness* – Part E01: *Colour fastness to water* includes specifications for two different solutions:


**Alkaline solution,** freshly prepared, using grade 3 water complying with ISO 3696, containing, per litre: 


* 0.5 g of ʟ-histidine monohydrochloride monohydrate ($\ce{C6H9O2N3.HCl.H2O}$);
* 5 g of sodium chloride ($\ce{NaCl}$);
and either
* 5 g of disodium hydrogen orthophosphate dodecahydrate ($\ce{Na2HPO4.12H2O}$)
or
* 2.5 g of disodium hydrogen orthophosphate dihydrate ($\ce{Na2HPO4.2H2O}$).


The solution is brought to pH 8 (± 0.2) with 0.1 mol/l sodium hydroxide solution.


**Acid solution,** freshly prepared, using grade 3 water complying with ISO 3696, containing, per litre:


* 0.5 g of ʟ-histidine monohydrochloride monohydrate ($\ce{C6H9O2N3.HCl.H2O}$);
* 5 g of sodium chloride ($\ce{NaCl}$);
* 2.2 g of sodium dihydrogen orthophosphate dihydrate ($\ce{NaH2PO4.2H2O}$).


The solution is brought to pH 5.5 (± 0.2) with 0.1 mol/l sodium hydroxide solution.


 4