Multielement Principal Component Analysis and Origin Traceability of Rice Based on ICP-MS/MS

Table 4

Isotope mass spectrometry.

	Mode	Reaction gas	Mass number	Eliminate interference
^7Li	MS/MS	NH3/He	Q1 = Q2 = 7	In situ mass spectrometry
^23Na	MS/MS	H2	Q1 = Q2 = 23	In situ mass spectrometry
^24Mg	MS/MS	NH3/He	Q1 = Q2 = 24	In situ mass spectrometry
^27Al	MS/MS	H2	Q1 = Q2 = 27	In situ mass spectrometry
^11B	MS/MS	NH3/He	Q1 = 11, Q2 = 60	Mass transfer
^31P	MS/MS	O2	Q1 = 31, Q2 = 47	Mass transfer
^32S	MS/MS	O2	Q1 = 32, Q2 = 48	Mass transfer
^39K	MS/MS	O2	Q1 = Q2 = 39	In situ mass spectrometry
^44Ca	MS/MS	NH3/He	Q1 = Q2 = 44	In situ mass spectrometry
^47Ti	MS/MS	O2	Q1 = 47, Q2 = 63	Mass transfer
^51V	MS/MS	O2	Q1 = 51, Q2 = 67	Mass transfer
^52Cr	MS/MS	O2	Q1 = 52, Q2 = 68	Mass transfer
^55Mn	MS/MS	H2	Q1 = Q2 = 55	In situ mass spectrometry
^56Fe	MS/MS	NH3/He	Q1 = 56, Q2 = 90	Mass transfer
^59Co	MS/MS	NH3/He	Q1 = 59, Q2 = 93	Mass transfer
^60Ni	MS/MS	NH3/He	Q1 = Q2 = 60	In situ mass spectrometry
^63Cu	SQ	He	Q2 = 63	—
^66Zn	MS/MS	H2	Q1 = Q2 = 66	In situ mass spectrometry
^72Ge	MS/MS	H2	Q1 = Q2 = 72	In situ mass spectrometry
^75As	MS/MS	O2	Q1 = 75, Q2 = 91	Mass transfer
^78Se	MS/MS	H2	Q1 = Q2 = 78	In situ mass spectrometry
^88Sr	MS/MS	H2	Q1 = Q2 = 88	In situ mass spectrometry
^95Mo	MS/MS	NH3/He	Q1 = Q2 = 95	In situ mass spectrometry
^111Cd	SQ	No gas	Q2 = 111	—
^115In	MS/MS	H2	Q1 = Q2 = 115	In situ mass spectrometry
^118Sn	SQ	He	Q2 = 118	—
^121Sb	SQ	No gas	Q2 = 121	—
^133Cs	MS/MS	O2	Q1 = Q2 = 133	In situ mass spectrometry
^137Ba	MS/MS	NH3/He	Q1 = Q2 = 137	In situ mass spectrometry
^208Pb	SQ	No gas	Q2 = 208	—