This study used a rapid sampling device, the Micro-Chamber/Thermal Extractor M-CTE250 connected to a cylindrical volumetric flask
, together with gas chromatography--mass spectrometry (GC-MS) to analyze VOC emissions from three-layer plywood under different temperatures, relative humidity levels, and ratios of air exchange rate-to-loading factor.
04 g iron chloride hexahydrate in volumetric flask
and diluted to 50 mL with distilled water.
Temperature: Volumetric flasks
are typically calibrated for use at 20 C.
0 mL volumetric flask
and topped with water, then, the plant material was decanted.
A 2 mL aliquot of standard stock solution of ceftriaxone sodium (1 mg/mL) was taken in four replicates in a volumetric flask
(100 mL) and mixed with 10 mL of 0.
0 mL of working standard in six 50 mL volumetric flasks
2] M) are added into a series of 10 mL volumetric flasks
, each containing 5 mL of buffer solution of pH 4.
The solution stability of butamirate citrate in the assay method was carried out by leaving the test solution of the samples in tightly capped volumetric flasks
at room temperature for 48 hours.
01%) and 1 ml of zirconium reagent in a standard volumetric flask
of 25 ml filled to the volume with methanol.
Various aliquots from CH and TR stock solutions, within the concentration range stated in Table 1, were transferred into two separate sets of 100-mL volumetric flasks
, and the solutions were completed to volume with water.
They guarantee the perfect positioning of a variety of small or unusually shaped tare containers, including HPLC vials, test tubes, Eppendorf and PCR tubes, flat-bottomed flasks and volumetric flasks
from 1 to 100 mL.
00 ml) were pipetted into volumetric flasks
(100 ml), pH value was adjusted to 2 with water and hydrochloric acid, thereafter L-ascorbic acid solution (2.