Abstract We used multi-component profiles to model the Hβ and [O III]λλ4959,5007 lines of SDSS J143030.22–001115.1, a narrow-line Seyfert 1 galaxy (NLS1) in a sample of 150 NLS1 candidates selected from the Sloan Digital Sky Survey (SDSS), Early Data Release (EDR). After subtracting the Hβ contribution from narrow line regions (NLRs), we found that its full width half maximum (FWHM) of broad Hβ line is nearly 2900 km s-1, significantly larger than the customarily adopted criterion of 2000 km s-1. With its weak Fe II multiples, we believe that SDSS J143030.22–001115.1 should not be classified as a genuine NLS1. When we calculate the virial black hole masses of NLS1s, we should use the Hβ linewidth after subtracting the NLR component.
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