Using Unused Pickling Juice

2 weeks ago I made 10 gallons of pickling juice for vegetables and only used 7 gallons. Today I decided to use the 3 remaining gallons of juice. I boiled the juice I made which was water, white vinegar, salt and sugar, and left it in the porcellan(spelling) pot that I originally boiled it in. The juice will cool down, and I will pour it into the glass containers with the vegetables. Is this juice still safe since it has sat out for 2 weeks (covered), even though I have boiled it for 5 minutes or should I just throw it out and start all over again. As a footnote, the pot is in great condition, no rust marks, it is all white, and the taste of the juice was fine before boiling.