Resonance ionization mass spectrometry of technetium

Determination of technetium-99 in environmental samples: A review

“…With the advantages of high sensitivity and short analysis time, MS has been applied in many areas and studied extensively, in recent years for measurement of 99 Tc, especially in low level environmental samples [14][15][16][17][18][19][20][21]112,[117][118][119]]. The first trace-level analysis of 99 Tc using MS was reported by Anderson et al [87].…”

“…Since then, extensive measurement of 99 Tc has been carried out using this technique. So far, several MS techniques, including AMS [14][15][16], RIMS [112,117], TIMS [17,118,119], and the popular ICP-MS [18][19][20][21], have been introduced to determine the concentration of 99 Tc.…”

“…Thermal ionization mass spectrometry (TIMS) and resonance ionization mass spectrometry (RIMS) are two of the more important of these [17,112,[117][118][119]. TIMS with multiple ion collectors is generally the method of choice for isotope ratio measurements with high precision (down to 0.002 %).…”

“…In terms of selectivity, Mo and Ru are the main interferences which might cause poor analytical results. It has been reported that three-photon ionization of 99 Tc shows a good RIMS scheme for analysis of samples containing Mo [117]. The mass spectral interference of Ru can be reduced using the multiplicative selectivity of multiple resonance as well as proper selection of ionization schemes [129].…”

“…Tc was first synthesized and isolated by Perrier et al in 1937 as a product from the bombardment of molybdenum with deuterons or neutrons [1]. So far 45 isotopes of Tc, ranging from 85 Tc to 117 Tc, have been synthesized, and most of them are short-lived isotopes with half lives of less than one hour. Table 1 lists the isotopes of Tc with half lives exceeding one hour.…”