Following these experiments, it was decided to carry out the retention experiments at pH 7. The amount of RB19 retained by [Zn Al Cl] as a function of contact time, using a constant adsorbent mass of 100 mg and initial concentrations varied from 100 to 800 mg/L, is shown in Fig. 3.
Data was acquired using a constant flow high-performance liquid chromatography (HPLC) system (Agilent Technologies, Santa Clara, CA) coupled to a Velos Pro Orbitrap Mass spectrometer with 100K mass resolution.
Purified RNA was quantified by spectrophotometry and the use of a constant mass of RNA for each quantitative assay was based on absorbance at 260 nm.
The mass of K2S2O8 used for digesting a constant mass of the same homogenized sediment was increased from 0.3 to 2.1 g in 0.3-g increments.
The progenitor model used here is still somewhat artificial in construction, with a constant mass loss parameter late in its evolution.
The moisture content of the coated and uncoated pellets was determined using an oven with forced air circulation and temperature control until a constant mass (50°C for 48 h) was reached.
The nanostructure we used consists of a graphene layer grown over a semiconductor material which introduces a constant mass term Δ [5].
The untreated wood was oven-dried to a constant mass and kept in sealed nitrogen containers until use.
The clipped material was dried to a constant mass (70°C) and weighed.
This step is repeated until the fish reaches a constant mass (maximum three extractions).
