This is true, I know it from canning, you have to use a canning salt which has 
no 
additives, or the liquid in your canning jars turns milky.

Good catch Keith!!

Sparrow
    
    
    
    I am replying to the so-called salt test that was put out.
    in 1998 I had this colloidal silver analysed by the Queensland Government( 
Australia) scientific services, the report was as follows: silver(mg/L) 18.9/ 
pH 7.9 .about average; a copy of this document is available to all.
     
    This Company advertised the ‘so called’ Salt Test. this smacks of 
scaremonger tactics for the following reason: They advise you add one teaspoon 
of ordinary table salt to 25 mL of colloidal silver. if the solution turns 
milky they say that silver salt or protein has been added and the silver is no 
good. You will find that most salt has the additive anti-caking agent 554. The 
Australian Commonwealth Department of Health advise in their book ‘ Additive 
Code Breaker’ 554 is Aluminium sodium silicate also known as analcite 
natrolite, it is used in Beverage whitener, drink machines, dried milk, and 
table salt and will turn any clear liquid a whitish colour. This company also 
state that there silver is in De- ionised water. Silver will not stay in 
suspension in Deionised water, it will settle to the bottom of the bottle

    csilver