An accurate determination method for cobalt in sage tea and cobalamin: Slotted quartz tube-flame atomic absorption spectrometry after preconcentration with switchable liquid-liquid microextraction using a Schiff base

Mn3O4 Nanozyme Coating Accelerates Nitrate Reduction and Decreases N2O Emission during Photoelectrotrophic Denitrification by Thiobacillus denitrificans-CdS

“…To determine the value of Cd/Mn in T. denitrificans-CdS@Mn 3 O 4 , the biosemiconductors were completely dissolved, and then, the concentrations of Cd and Mn were determined using AAS. The i – t curve was recorded in 0.1 M phosphate-buffered solution (PBS) (pH = 7) using a CHI660E electrochemical workstation (Chenhua Inc., Shanghai, China) …”

“…The infrared (IR) spectra of the samples were obtained from KBr disks using a Fourier transform infrared (FTIR) The UV−vis spectra of the biosemiconductors were recorded using a spectrometer (UV2600, Shimadzu) with an integrating sphere. To determine the value of Cd/Mn in T. denitrificans-CdS@Mn 3 O 4 , the biosemiconductors were completely dissolved, 28 and then, the concentrations of Cd and Mn were determined using AAS. The i−t curve was recorded in 0.1 M phosphate-buffered solution (PBS) (pH = 7) using a CHI660E electrochemical workstation (Chenhua Inc., Shanghai, China).…”

A Univariate Optimization Strategy for Pre-concentration of Cobalt(II) in Various Matrixes by a DLLME before Analysis Using FAAS

“…Often, quantifying very low levels of an element requires a separation step with pre-concentration. In addition, the analytical techniques available cannot present the selectivity and sensitivity requirement appropriate for analyzing this form of matrix sample [17][18]. Liquid-liquid extraction (LLE) has been the technique of choice for sample enrichment due to this procedure, among others, has a number of attractive features, such as versatility and simultaneous extractor of several components, as there is the possibility of using a wide variety of organic solvents [19].…”

A Simple and Effective Quantification of Water‐Soluble Rhodium in Soil Samples by Magnetic‐Colloidal‐Gel‐Assisted Dispersive Solid Phase Extraction

“…Thus, FAAS has been used for determination of several elements despite its high detection limits [21] . In order to increase the detection power of FAAS systems, the interaction of analyte atoms with the hollow cathode lamp light is increased by equipping the burner head with a cylindrical‐shaped slotted quartz tubes [22] . With the attached SQT, the duration of free analyte atoms in the flame is increased and with a longer optical path.…”

“…[21] In order to increase the detection power of FAAS systems, the interaction of analyte atoms with the hollow cathode lamp light is increased by equipping the burner head with a cylindrical-shaped slotted quartz tubes. [22] With the attached SQT, the duration of free analyte atoms in the flame is increased and with a longer optical path. Hence, 2-5 times improvement in detection power can be achieved compared to a system without the SQT.…”