The Effect of Complexity of a Matrix on Variation of Platinum Group Metal Determination Using ICP OES and Correction Method: A Spent Catalyst as a Case Study.

Recycling of platinum group metals (PGMs) from spent catalysts is a promising alternative to the sustainable metallurgy of critical metals, which requires an accurate and reliable analytical approach for their determination. A potential microwave-assisted digestion and multivariate calibration procedure was investigated to determine the PGM contents in various spent catalyst samples. The effect of several interelements (Al, Mg, Ce, and Na) was evaluated by the single factor at once and multilinear regression models, which demonstrated a significant variation in PGM determination using inductively coupled plasma optical emission spectrometry.

Efficient Recovery of Vanadium and Titanium from Domestic Titanomagnetite Concentrate Using Molten Salt Roasting and Water Leaching.

The traditional roasting technique using sodium salts in vanadium production has been disadvantageous due to the large consumption of energy and the emission of harmful gases. A modified process using molten salt roasting and water leaching to extract vanadium and titanium from domestic titanomagnetite concentrate was investigated. The roasting process was performed under optimal conditions: the weight ratio between the sample and NaOH of 1:1, the temperature of 400 °C, and the experiment time 90 min, and the conversion of vanadium could be maximized to 90%.

A review on the recycling processes of spent auto-catalysts: Towards the development of sustainable metallurgy.

Spent auto-catalysts are considered as promising platinum group metals (PGMs) resources based on their rapidly increasing demand along with the underlying uncertainty of the sustainability and long-term availability of PGMs. Recycling spent auto-catalysts presents attractive advantages, particularly for the conservation of primary resources reserves, and for the reduction of negative environmental impact due to exploitation. PGM reclamation is the major aim of recycling operations despite their minor concentration in spent auto-catalysts, which implies that the remaining materials are disposed of as unwanted solid waste after the extraction process.

Antinociceptive profiles and mechanisms of centrally administered oxyntomodulin in various mouse pain models.

In the present study, the antinociceptive profiles of oxyntomodulin were examined in ICR mice. Oxyntomodulin administered intrathecally (i.t.

Blood glucose regulation mechanism in depressive disorder animal model during hyperglycemic states.

Depression is more common among diabetes people than in the general population. In the present study, blood glucose change in depression animal model was characterized by various types of hyperglycemia models such as d-glucose-fed-, immobilization stress-, and drug-induced hyperglycemia models. First, the ICR mice were enforced into chronic restraint stress for 2h daily for 2 weeks to produce depression animal model.

Depletion of norepinephrine of the central nervous system Down-regulates the blood glucose level in d-glucose-fed and restraint stress models.

DSP-4[N-(2-chloroethyl)-N-ethyl-2-bromobenzylamine hydrochloride] is a neurotoxin that depletes norepinephrine. The catecholaminergic system has been implicated in the regulation of blood glucose level. In the present study, the effect of DSP-4 administered intracerebroventricularly (i.

Effect of D-glucose feeding on mortality induced by sepsis.

Sepsis is the life-threatening response to infection which can lead to tissue damage, organ failure, and death. In the current study, the effect of orally administered D-glucose on the mortality and the blood glucose level induced by D-Galactosamine (GaLN)/lipopolysaccharide (LPS)-induced sepsis was examined in ICR mice. After various amounts of D-glucose (from 1 to 8 g/kg) were orally fed, sepsis was induced by injecting intraperitoneally (i.

Disassembly and physical separation of electric/electronic components layered in printed circuit boards (PCB).

Although printed circuit boards (PCBs) contain various elements, only the major elements (i.e., those with content levels in wt% or over grade) of and precious metals (e.