Quotation marks issue - causing ERROR

[Charlie]

I have been using PHREEQC on my mac and I kept getting errors relating to this section of the input.

USER_PUNCH
-headings Zn(mg/l) Pb(mg/l)
-start
10 Zn_sol = (mol(“Zn+2”)*65.38*1000)
20 Pb_sol = (mol(“Pb+2”)*207.2*1000)
30 PUNCH Zn_sol Pb_sol
40 PUNCH DESCRIPTION
-end

All seemed ok, but it stopped running with this message:

ERROR: Syntax_error : missing " or ( in line:

ERROR:  in BASIC line
 10  Zn_sol = (mol(”Zn+2”)*65.38*1000)

ERROR: Fatal Basic error in USER_PUNCH.
Stopping.

After a LOT of confusion I looked at the output file and noticed that it read:


ERROR: Syntax_error : missing " or ( in line:
ERROR:  in BASIC line
 10  Zn_sol = (mol(‚ÄùZn+2‚Äù)*65.38*1000)
ERROR: Fatal Basic error in USER_PUNCH.
Stopping.

I realised that the character type on my Mac keyboard wasn't being parsed by PHREEQC correctly.
I solved the issue easily by copying and pasting the " from an example from the PHREEQC website. A small but important technical detail!  Hope this helps.

USER_PUNCH
-headings Zn(mg/l) Pb(mg/l)
-start
10 Zn_sol = (mol("Zn+2")*65.38*1000)
20 Pb_sol = (mol("Pb+2")*207.2*1000)
30 PUNCH Zn_sol Pb_sol
40 PUNCH DESCRIPTION
-end   

[dlparkhurst]

You also could use single quotes, for example mol('Zn+2').