Comparison and Validation of Different Alternative Sample Preparation Procedures of Tea Infusions Prior to Their Multi-Element Analysis by FAAS and ICP OES

Szymczycha‐Madeja, Anna; Wełna, Maja; Pohl, Paweł

doi:10.1007/s12161-015-0323-3

Cited by 16 publications

(5 citation statements)

References 27 publications

(111 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The infusions were drained, and the residue on the drain was flushed with hot water. The prepared herbal tea infusions (10 ml) were placed in PP tubes and acidified with HNO 3 (POCH, Poland) to a concentration of 0.25 mol l −1 [6]. The concentrations of the elements in the infusions were determined using the methods described above.…”

Section: Methodsmentioning

confidence: 99%

Determination of Minerals in Herbal Infusions Promoting Weight Loss

Samolińska

Kiczorowska

Kwiecień

et al. 2016

Biol Trace Elem Res

View full text Add to dashboard Cite

The study aimed at determination of the mineral composition of slimming herbal teas and estimation of the coverage of their total intake with infusions in women’s daily diet. The content of Na+, K+, Ca+2, Mg+2, Zn+2, Cu+2, Fe+2, and Mn+2 was determined in infusions and mineralisates obtained from the slimming herbal teas. Among macroelements, the highest content was recorded for Ca—on average 3.73 mg·100 ml−1 in its infusion. Mn was a microelement with the highest concentration amounting to 0.20 mg·100 ml−1 in the infusion. The investigations revealed that, referring to the dietary reference intakes (DRIs), weight loss herbal infusions cover the recommended daily intake of manganese for women to the highest extent (on average 54 %), which suggests that they can be a major source of this microelement for the organism. Herbal teas only to a slight extent (to approx. 4 %) covered the recommended daily intake of magnesium, sodium, potassium, iron, zinc, copper, and calcium in the daily diet.

show abstract

Section: Methodsmentioning

confidence: 99%

Determination of Minerals in Herbal Infusions Promoting Weight Loss

Samolińska

Kiczorowska

Kwiecień

et al. 2016

Biol Trace Elem Res

View full text Add to dashboard Cite

show abstract

“…Plants grown in soils with (pH < 4.5) favors the extraction of elements such as Al and its fixation in tea leaves. The concentrations of Al in tea leaves grown in acid soil can vary from 20 to 13,000 mg kg −1 , and in some extreme cases can reach levels of up to 27,000 mg kg −1 (Szymczycha-Madeja et al, 2016;Wong et al 2003).…”

Section: Applicationmentioning

confidence: 99%

Multivariate Optimization for the Development of a Fast and Simple Ultrasound-Assisted Extraction Procedure for Multielemental Determination in Tea Leaves by Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES)

et al. 2018

View full text Add to dashboard Cite

The current study describes a fast and efficient procedure of ultrasound-assisted extraction for determination of Ca, Mg, K, Na, Cu, Zn, Mn, and Al in tea leaves by inductively coupled plasma optical emission spectrometry (ICP OES). The variables of procedure were optimized using the Box-Behnken design and the conditions selected were nitric acid concentration (1.0 mol L −1), sonication time (7 min), and sonication temperature (75°C). The extraction efficiency was calculated using the analyte concentration obtained by a total digestion procedure as reference. Accuracy was confirmed by analysis of certified reference material of apple leaves (NIST 1515) and spinach leaves (NIST 1570a) using the procedure proposed. A statistical evaluation using Student's t test showed that there is no significant difference between the value obtained with the proposed procedure and the certified value, at 95% confidence level. The proposed procedure was successfully applied and is a good alternative to conventional acid digestion procedure and can be applied to routine analysis for determination of Ca, Mg, K, Na, Zn, Mn, Cu, and Al in tea leaves used for the preparation of infusions.

show abstract

“…Nowadays, for determination of trace heavy metals, atomic absorption spectrometry equipped with flame (FAAS) or graphite furnace (ETAAS) and inductively coupled plasma emission spectrometry (ICP) [ 5 – 7 ] are widely used analytical techniques. Among these techniques, although flame atomic absorption spectrometry is commonly used for heavy metal determination, its sensitivity is not enough to direct determination of trace and ultra-trace amount of heavy metals in real samples; therefore, some pretreatment procedures, such as separation and preconcentration, are needed [ 8 ].…”

Section: Introductionmentioning

confidence: 99%

A Method to Determination of Lead Ions in Aqueous Samples: Ultrasound-Assisted Dispersive Liquid-Liquid Microextraction Method Based on Solidification of Floating Organic Drop and Back-Extraction Followed by FAAS

Arpa

Arıdaşır

2018

Journal of Analytical Methods in Chemistry

View full text Add to dashboard Cite

Ultrasound-assisted dispersive liquid-liquid microextraction method based on solidification of floating organic drop and back-extraction (UA-DLLME-SFO-BE) technique was proposed for preconcentration of lead ions. In this technique, two SFODME steps are applied in sequence. The classical SFODME was applied as the first step and then the second (back-extraction) step was applied. For the classical SFODME, Pb ions were complexed with Congo red at pH 10.0 and then extracted into 1-dodecanol. After this stage, a second extraction step was performed instead of direct determination of the analyte ion in the classical method. For this purpose, the organic phase containing the extracted analyte ions is treated with 1.0 mol·L−1 HNO3 solution and then exposed to ultrasonication. So, the analyte ions were back-extracted into the aqueous phase. Finally, the analyte ions in the aqueous phase were determined by FAAS directly. Owing to the second extraction step, a clogging problem caused by 1-dodecanol during FAAS determination was avoided. Some parameters which affect the extraction efficiency such as pH, volume of extraction solvent, concentration of complexing agent, type, volume, and concentration of back-extraction solvent, effect of cationic surfactant addition, effect of temperature, and so on were examined. Performed experiments showed that optimum pH was 10.0, 1-dodecanol extraction solvent volume was 75 μL, back-extraction solvent was 500 μL, 1.0 mol·L−1 HNO3, extraction time was 4 min, and extraction temperature was 40°C. Under optimum conditions, the enhancement factor, limit of detection, limit of quantification, and relative standard deviation were calculated as 81, 1.9 μg·L−1, 6.4 μg·L−1, and 3.4% (for 25 μg·L−1 Pb2+), respectively.

show abstract

Comparison and Validation of Different Alternative Sample Preparation Procedures of Tea Infusions Prior to Their Multi-Element Analysis by FAAS and ICP OES

Cited by 16 publications

References 27 publications

Determination of Minerals in Herbal Infusions Promoting Weight Loss

Determination of Minerals in Herbal Infusions Promoting Weight Loss

Multivariate Optimization for the Development of a Fast and Simple Ultrasound-Assisted Extraction Procedure for Multielemental Determination in Tea Leaves by Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES)

A Method to Determination of Lead Ions in Aqueous Samples: Ultrasound-Assisted Dispersive Liquid-Liquid Microextraction Method Based on Solidification of Floating Organic Drop and Back-Extraction Followed by FAAS

Contact Info

Product

Resources

About