**Parameter** |
**Value** |

Mass distribution ratio for atenolol (Dm1) |
0.65 |

Mass distribution ratio for pindolol [I.S.] (Dm2) |
1.91 |

Relative retention time (Rr) |
1.76 |

Number of theoretical plates for atenolol (N1) |
2319 |

Number of theoretical plates for pindolol [I.S.] (N2) |
3669 |

Resolution**(**R**)** |
7.63 |

Tailing factors for atenolol (T1) |
1.06 |

Tailing factors for pindolol [I.S.] (T2) |
1.13 |