Study on Identification Method of Fructus Lycii Origin by Mineral Elements

In order to rapid discriminate the source of Fructus Lycii origin, Fructus Lycii from five different areas were collected, the content of K, Ca, Na, Mg, Fe, Zn ,Cu and Mn were analyzed with flame atomic absorption spectrometry,and the data was analyzed with Stepwise discriminant analysis method,and the discriminant function was established. The results showed that Fructus Lycii from five different areas was well clustering. The discriminant model was re-discriminated by using the method of mutual test; its discrimination accuracy was 94.4% for the original samples and the unknown samples. The recognition rates for Ningxia, Hebei, Qinghai cultivation regions were all 100%. In conclusion, mineral element combined with chemometrics method was a fast and accurate method to identify the origin source of Fructus Lycii.

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Mineral elements in borehole water from Northern and Western geo-political zones of Nasarawa state, Nigeria

International Journal of Scientific World ◽

10.14419/ijsw.v5i1.6913 ◽

2016 ◽

Vol 5 (1) ◽

pp. 1

Author(s):

Bitrus Wokhe Tukura ◽

Ibrahimn G. Igube

Keyword(s):

Drinking Water ◽

Potable Water ◽

Absorption Spectrometry ◽

Mineral Elements ◽

Total Hardness ◽

Mineral Element ◽

Spectrometry Method ◽

Optimal Ratio ◽

Borehole Water ◽

High Concentrations

Mineral element contents in potable water at high concentrations may affect its quality. Concentrations of Na+, K+, Ca2+, and Mg2+ were determined in water from some boreholes in some parts of Nasarawa state, Nigeria. Levels of Na+ and K+ were determined using flame photometry, while Ca2+ and Mg2+ were quantified with the aid of atomic absorption spectrometry method. Concentrations of Ca2+ (10 – 42 mg/L) and Mg2+ (0.03 – 1.63 mg/L) were relatively low in the water samples. Nasarawa Toto (NTT) recorded the highest levels of mineral elements (0.26 – 10.61 mg/L). Mean concentrations of Na+ (7.59 – 11.08 mg/L) and Mg2+ (0.13 – 0.56 mg/L) were highest and lowest respectively. The levels of mineral elements according to studied areas varied in the order of NTT > NEG (Nasarawa Eggon) > KRV (Karu) > AKW (Akwanga) > KEF (Keffi) > GRU (Garaku). The ratios of Na/K for borehole water at Wayo (3.35) and Wamba Kurmi (3.55) at Wamba (WAM) areas were the closest to the optimal ratio of 3: 1 for the control of cardiovascular diseases, while Ca/Mg ratios were above the optimal ratio of 2:1. Total hardness levels (10 – 48 mgCaCO3/L) for water from the boreholes were < 60 mg/L, therefore, classified as being soft in nature. Mineral element concentrations in water from the boreholes were within the WHO acceptable limits for drinking water.

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Barrel-to-barrel variation of phenolic and mineral composition of red wine

BIO Web of Conferences ◽

10.1051/bioconf/20191202011 ◽

2019 ◽

Vol 12 ◽

pp. 02011 ◽

Cited By ~ 1

Author(s):

A. Pilet ◽

R.B. de Sousa ◽

J.M. Ricardo-da-Silva ◽

S. Catarino

Keyword(s):

Trace Elements ◽

Inductively Coupled Plasma ◽

Red Wine ◽

Chemical Characterization ◽

Absorption Spectrometry ◽

Mineral Elements ◽

Phenolic Composition ◽

Minor And Trace Elements ◽

Flame Atomic Absorption ◽

General Physical

The aim of the present work was to evaluate the effect of barrel-to-barrel variability on chemical characteristics of red wine. An experimental trial was carried out involving two red wines from the Portuguese DO Dão and independent replicates of French oak barrels (Quercus sessiliflora Salisb.) from three different cooperages. After six months of aging, comprehensive chemical characterization of the wines took place: general physical-chemical analysis by FTIR, phenolic composition and chromatic characteristics, major mineral elements (K, Mg, Ca, Na, and Fe) by flame atomic absorption spectrometry (FAAS), minor and trace elements (Li, Be, Ti, Mn, Co, Ni, Cu, Zn, Ga, As, Rb, Sr, Y, Zr, Nb, Mo, Cd, Sn, Sb, Cs, Ba, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, W, Tl, Pb, and U) by inductively coupled plasma mass spectrometry (ICP-MS). In respect to barrel effect, significant differences between replicates were observed for phenolic composition, especially polymerized pigments, flavonoids and color intensity. Regarding major, minor and trace elements, no significant differences were observed between barrel replicates with exception of iron and copper.

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Determination of Trace Amount of Lead in Industrial and Municipal Effluent Water Samples Based on Dispersive Liquid-Liquid Extraction

Journal of the Mexican Chemical Society ◽

10.29356/jmcs.v58i2.169 ◽

2017 ◽

Vol 58 (2) ◽

Author(s):

Hamid Shirkhanloo ◽

Kaveh Sedighi ◽

Hassan Zavvar Mousavi

Keyword(s):

Water Samples ◽

Chelating Agent ◽

Absorption Spectrometry ◽

Accurate Method ◽

Liquid Extraction ◽

Calibration Graph ◽

Lead Ion ◽

Flame Atomic Absorption ◽

Liquid Liquid Extraction

In this study, a simple, sensitive and accurate method was developed for the determination of lead ion by combining ionic liquid dispersive liquid-liquid extraction (IL-DLLE) with flame atomic absorption spectrometry. Tetraethylthiuram disulfide (TETD), acetone and 1-octyl-3-methylimidazolium hexafluorophosphate [(C8MIM) (PF6)] were used as the chelating agent, dispersive and extraction solvent, respectively. Under the optimal onditions, the calibration graph was linear in the range of 5-190 μg L-1 of lead and the detection limit was 0.8 μg L-1 with a sample volume of 200 mL. The proposed method was validated by the analysis of one certified reference material and applied successfully to the determination of lead in real water samples.

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PENENTUAN LOGAM BESI DAN SENG TOTAL DALAM PRODUK PERIKANAN MENGGUNAKAN FLAME ATOMIC ABSORPTION SPECTROMETRY DAN PENGUKURAN NILAI KETIDAKPASTIANNYA

Jurnal Kimia Terapan Indonesia ◽

10.14203/jkti.v16i2.9 ◽

2014 ◽

Vol 16 (2) ◽

pp. 62-67

Author(s):

Willy Cahya Nugraha ◽

Christine Elishian ◽

Rosi Ketrin

Keyword(s):

Analytical Chemistry ◽

Certified Reference Materials ◽

National Research Council ◽

Absorption Spectrometry ◽

Accurate Method ◽

Essential Elements ◽

Preparation Methods ◽

Flame Atomic Absorption ◽

Complex Preparation ◽

Fish Product

Besi (Fe) dan Seng (Zn) merupakan unsur yang berguna bagi manusia. Keberadaan logam Fe dan Zn dalam produk perikanan yang cukup kecil (trace), mudah tekontaminasi oleh kondisi lingkungan, dan metoda preparasinya yang komplek menyebabkan penentuan logam Fe dan Zn ini cukup sulit, sehingga perlu dicari suatu metoda uji yang valid dan akurat. Dalam penelitian ini dilakukan pengembangan metoda standar American of Analytical Chemistry (AOAC) tahun 2005 no. 999.10 dengan menggunakan bahan acuan bersertifikat DORM 3 (Fish Protein Certified Reference Material for Trace Metal) dari National Research Council of Canada (NRCC) untuk menguji keakuratan dan ketertelusuran hasil ke Standard Internasional (SI). Metoda ini sudah divalidasi berdasarkan parameter-parameter kimia analitik. Hasil penelitian menunjukkan rata-rata kadar Fe dan Zn dalam sampel perikanan sebesar 178 ± 14 mg.Kg-1 dan 59,8 ± 6,6 mg.Kg-1 (berat kering) dengan faktor cakupan 2 dan tingkat kepercayaan 95%, yang berada pada rentang yang ditentukan 183,5 ± 4,3 mg Kg-1 and 60 ± 1,1 mg Kg-1.Kata kunci : Fe, Zn, trace, CRM, perikanan Iron (Fe) and Zink (Zn) are essential elements for human being. Determination of this elements in fish products is quite difficult because of Fe and Zn content in trace level, easy to be contaminated by the environmental conditions, and, complex preparation methods so that it is needed to find a good and accurate method. In this paper, we have developed a standard method from American of Analytical Chemistry (AOAC), 2005, no. 999. using DORM 3 as Certified Reference Materials (CRMs) to check accuracy and traceability’s results to Standard International (SI). The method has been validated according to analytical parameters. The results showed that means of Fe and Zn concentration in the investigated fish product were 178 ± 14 mg.Kg-1 and 59.8 ± 6,6 mg.Kg-1 respectively with coverage factor 2 and 95% level of confident, and in range of expected mass were 183,5 ± 4,3 mg.Kg-1 and 60 ± 1,1 mg.Kg-1in dry basis.Keywords : Fe, Zn, trace, CRM, fisher

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Determination of Mineral Elements in Fermented Liquid with Temperature-Controlled Wet Digestion and Flame Atomic Absorption Spectrometry

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.535-537.2591 ◽

2012 ◽

Vol 535-537 ◽

pp. 2591-2595

Author(s):

Zhi Xi Gao ◽

Yan Hong Wu ◽

Yan Wen Luo ◽

Qin Song Mu ◽

Ke Hou Ao ◽

...

Keyword(s):

Atomic Absorption Spectrometry ◽

Atomic Absorption ◽

Flame Atomic Absorption Spectrometry ◽

Absorption Spectrometry ◽

Mineral Elements ◽

Wet Digestion ◽

Flame Atomic Absorption ◽

Relative Standard ◽

Temperature Controlled

Temperature-controlled HNO3-H2O2 wet digestion and flame atomic absorption spectrometry (FAAS) were employed in the determination of mineral elements in the fermented liquid residue of livestock dung. The 8 most common mineral elements-K, Na, Fe, Mn, Cu, Zn, Ca and Mg-in fermented liquid were selected for analysis, and the experimental results showed that the correlation coefficient (r) of each mineral element’s quantitative standard curve was >0.9993, the quantitation limit was 0.90-67.0 ng/L, the relative standard deviation (RSD) was 0.79%-2.51%, and the standard addition recovery rate was 95%-103%. It was found that the average content of the 8 mineral elements in fermented liquid was in a descending order of K, Na, Ca, Mg, Fe, Mn, Zn and Cu.

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Levels of selected metals in coriander (Coriandrum sativum L.) leaves cultivated in four different areas of Ethiopia

10.31221/osf.io/3cwmn ◽

2019 ◽

Author(s):

Chem Int

Keyword(s):

Pearson Correlation ◽

Absorption Spectrometry ◽

Coriandrum Sativum ◽

Good Source ◽

Digestion Method ◽

Flame Atomic Absorption ◽

Significant Difference ◽

Metal Levels ◽

Good Percentage ◽

Coriander Leaves

Coriander (Coriandrum sativum L.) is one of the herbs which is used for medicinal and food purposes. In the present study the levels of selected metals in coriander leaves were determined in the samples collected from four different farmlands (Sebeta, Mekanisa, Holeta and Gefersa) in Ethiopia where its cultivation is common. The levels of metals were determined after digestion of samples with the mixture of 4 mL of HNO3 and 4 mL of HClO4 at 300 oC for 3:00 hours by flame atomic absorption spectrometry. The optimized wet digestion method for coriander leaves analysis was validated through the recovery experiment and a good percentage recovery was obtained (93.2-101%). The levels of metals were found in the range Ca, 2319–3503 mg/kg; Zn, 33.4–54.8 mg/kg and Cr, 5.55-9.86 mg/kg while the trace metals Cu, Ni, Cd and Pb were too low to be detected. The results indicated that Ethiopian coriander is a good source of essential metals and free from the toxic metals Pb and Cd. A statistical analysis of variance (ANOVA) at 95% confidence level indicated that there is significant difference (p < 0.05) in the levels of all detected metals between the four sample means. The Pearson correlation was used to predict the dependence of metal levels on one another. The levels of the metals determined in this study compared well with those reported for coriander leaves from some other parts of the world.

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