def calc_TS(Sal):
    """
    Calculate total Sulphur

    Morris, A. W., and Riley, J. P., Deep-Sea Research 13:699-705, 1966:
    this is .02824.*Sali./35. = .0008067.*Sali
    """
    a, b, c = (0.14, 96.062, 1.80655)
    return (a / b) * (Sal / c)