svoc mix

[organicchem]

Hi Everyone

I have purchased accustandard 8270 svoc mix dissolved is 75:25 (metheylene chloride : benzene). I want to make secondary stand by diluting this mix. For diluting which solvent is best either hexane or methylene chloride. pls. assist
regards

[Johnny Rod]

I would ssay this depends entirely on whicih of the two will obliterate any parts of the chromatogram. As you are aleady in 75% methylene chloride you might as well use more. NB check your blank injections, this stuff often has a few impurity peaks in it striaght from the bottle.

[AICMM]

organicchem,

I would suggest you look at what your samples are going to end up in. If you are doing environmental and using DCM and will KD your samples down to 1 mL in DCM, then I would dilute your standard in DCM.

Best regards,

AICMM

[Alexandre]

There is no issue with solubility as your next dilution will be at least 10 folds.
For env. samples we used pure DCM.
Consider the Certan vials (Supelco) too.