diff --git a/libra_toolbox/tritium/helpers.py b/libra_toolbox/tritium/helpers.py
deleted file mode 100644
index 728456c..0000000
--- a/libra_toolbox/tritium/helpers.py
+++ /dev/null
@@ -1,99 +0,0 @@
-from libra_toolbox.tritium.model import ureg
-import matplotlib.ticker as mticker
-import math
-
-
-def background_sub(measured, background):
-    """Substracts the background of a measured activity.
-    Returns zero if the background is greater than measurement.
-
-    Args:
-        measured (pint.Quantity): The measured activity
-        background (pint.Quantity): the background acitivity
-
-    Returns:
-        pint.Quantity: activity with substracted background
-    """
-    if measured > background:
-        return measured - background
-    else:
-        return 0 * ureg.Bq
-
-
-def substract_background_from_measurements(raw_measurements):
-    """Substracts the background from a set of measurements.
-
-    Args:
-        raw_measurements (dict): The raw measurements. The keys are the measurement
-        numbers, and the values are dictionaries with the keys being the vial
-        numbers and the values being the measured activities. The dictionary should
-        also contain a key "background" with the background activity.
-
-    Returns:
-        dict: The measurements with the background substracted. The keys are the
-        measurement numbers, and the values are dictionaries with the keys being the
-        vial numbers and the values being the measured activities with the
-        background substracted.
-    """
-    measurements_after_background_sub = {
-        i: {
-            j: background_sub(act, raw_measurements[i]["background"])
-            for j, act in raw_measurements[i].items()
-            if j != "background"
-        }
-        for i in raw_measurements
-    }
-    return measurements_after_background_sub
-
-
-def cumulative_activity(measurements):
-    """Calculates the cumulative activity of a set of measurements.
-
-    Args:
-        measurements (dict): The measurements. The keys are the measurement numbers,
-        and the values are dictionaries with the keys being the vial numbers and the
-        values being the measured activities.
-
-    Returns:
-        list: The cumulative activity of the measurements
-    """
-    for measurement in measurements.values():
-        if "background" in measurement:
-            raise ValueError("Background should be substracted first")
-
-    total_samples = []
-    for measurement in measurements.values():
-        total_sample = sum(list(measurement.values()))
-        total_samples.append(total_sample)
-
-    cumulative_values = []
-    for total_sample in total_samples:
-        if cumulative_values:  # if list is not empty
-            cumulative_values.append(cumulative_values[-1] + total_sample)
-        else:
-            cumulative_values.append(total_sample)
-
-    return cumulative_values
-
-
-class ScalarFormatterClass(mticker.ScalarFormatter):
-    def format_data(self, value):
-        # docstring inherited
-        e = math.floor(math.log10(abs(value)))
-        s = round(value / 10**e, 10)
-        significand = self._format_maybe_minus_and_locale(
-            "%d" if s % 1 == 0 else "%1.3g",
-            s,  # here is the change! the format %1.3g is used to have 2 significant digits
-        )
-        if e == 0:
-            return significand
-        exponent = self._format_maybe_minus_and_locale("%d", e)
-        if self._useMathText or self._usetex:
-            exponent = "10^{%s}" % exponent
-            return (
-                exponent
-                if s == 1  # reformat 1x10^y as 10^y
-                else rf"{significand} \times {exponent}"
-            )
-        else:
-            return f"{significand}e{exponent}"