Can pregnant women safely work on Arsenic analysis?

A. What kind of liability would someone have in this forum by giving you advice on this? (shudder)

A. A pregnant woman can often get no advice on issues crucial to her from her doctor, her employer, or her mega-trillion dollar government for fear of liability ... and then must turn to strangers on the internet. It's not quite clear whether Sinny is asking for herself or whether she is in school trying to learn the answer so she can offer help later. Let's hope it's the latter and that she is fearless enough to put her education to use.

But things change and the next generation may not allow lawyers the run of the place like this foolish one has, but only reward them in proportion to their contribution to society :-)

I'm no expert, but have not heard that arsenic poses special dangers to pregnant women. You should, though, certainly have the MSDS (material safety data sheet) for every chemical you are working with, and the MSDS should alert you to that kind of special dangers. Good luck.

A. Have a talk with your supervisor after you have carefully read the MSDS sheets for each of the chemicals involved.
I am not a Dr or an industrial hygienist, but it would seem that if you are wearing the required personal protective equipment and working in a hood, you should have a low risk.
Arsenic metal should not be hygroscopic. The salts probably are. Look at the MSDS.
If you think that it might be a problem, then you should quit for the duration. Perception is everything.