Kodak HT-2 and ST-1 recipe

[DutchDarkroom]

After a bunch of internet scraping i finally found recipes for kodak HT-2 and ST-1.

Re: Kodak HT-2 residual hypo test, August 11, 2008

The recipes stated here are as follows:

To make 1/2 liter of Kodak HT-2
water ------ 375 ml
acetic acid (28%) ---62.5 ml
silver nitrate ---- 3.75 g
water to make 500 ml

Kodak ST-1 Stock Solution
Water 100.0 ml
Sodium sulfide, anhydrous 2.0 grams
To use dilute the stock solution 1 part stock to 9 parts water.

Does anyone know if these are correct?
And if so, would these tests be a good way to know i'm fixing and washing well for archival prints?
The link states selenium could be used as an alternative to ST-1, is this true? (i can only get sodium sulfide at 60%)

Edit:
Isn't part B of sepia toner just sepia sulphide, can i use this as an alternative to st-1?

 

[LFGuy]

My Kodak B&W Darkroom Dataguide has a 1L version of HT-2 with 2x your amounts, so that is correct for what you posted.

 

[DutchDarkroom]

My Kodak B&W Darkroom Dataguide has a 1L version of HT-2 with 2x your amounts, so that is correct for what you posted.

Thanks for your reply, the link i posted also refered to this 1 liter version so that checks out.