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Selective gas chromatography mass spectrometry method for ultratrace detection of selenocyanate

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Figure 3. Determination of SeCN − at the detection limit. 0.3 ng/g Se was detected by (a) EI GC/MS/MS on m/z transition from 134.96 to 106.93 (S/N = 13.5), (b) EI GC/MS on m/z 134.96 (S/N = 6.5), (c) NCI GC/MS on m/z 105.9 (S/N = 23.8), and (d) IC ICP-DRC-

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