The original recipe was 1 part MMS (22.4% sodium chlorite solution) to 5 parts 10% citric acid. That changed to 1 part MMS to 1 part 50% citric acid, although you still find both on the Internet. Today, citric acid is not recommended and instead 4% HCL is what the G2C suggests to use to activate MMS.
Citric acid is a big part of the horrible taste of MMS1 and some people can not tolerate citric acid at all, which can cause stomach problems. I suggest you throw away your citric acid and buy some 4% HCL. The mix is 1:1 MMS to 4% HCL. I am amazed that many sellers of MMS still offer citric acid. They should know better, but they don't keep up on the latest protocols.
Speaking of protocols, the latest ones are in Jim Humble's latest
book,
MMS Health Recovery Guidebook. You will find over 50 protocols and a wealth of information in the book.