抄録
Iodine (I2) was found to be detected as I- with high sensitivity when solution of iodine in i-C3H7OH-H2O-CHCl3 (8:2:0.5, v/v) was electrosprayed in the negative ion mode. The strong appearance of I- in electrospray mass spectra is due to the reduction of I2 to I- at the liquid/metal interface of the electrospray capillary needle. When the concentration of iodine in solution was increased (≥ 10-5 M)), the negative ions I3- and I5- as well as I- were observed. The lower limit of iodine concentration for the detection of I2 as I- was ~10-9 M. This indicates that the electrospray ionization mass spectrometry could be the new method for the analysis of iodine with high sensitivity.
