Journal of Chemical Metrology

A scientific open access journal in the field of analytical chemistry and accreditation
Editor-in-Chief: Ahmet C Gören

LATEST ARTICLES

Original Article

J. Chem. Metrol. (2018) 12:1 ; 79 - 88
by Gulcin Ozer, Etil Guzelmeric, Gozde Sezgin, Ercan Ozyurek, Avni Arslan, Ekrem Sezik and Erdem Yesilada
Abstract

In this study, it was aimed to qualify the rhizome samples of butcher’s broom (Ruscus aculeatus L.) gathered from various populations distributed naturally in The Marmara Region of Anatolia (Asian part of Turkey) based on the methods described in European Pharmacopoeia. For this purpose, rhizomes were sampled from 18 divers populations; namely, 6 from Istanbul, 4 from Bursa, 4 from Adapazarı, 2 from Balıkesir and 2 from Çanakkale. For qualitative analysis HPTLC method was used in order identify ruscogenin and stigmasterol and these were determined in all samples. For quantitative analysis, concentrations of total ruscogenin (mixture of neoruscogenin and ruscogenin) were analyzed by HPLC technique. According to The European Pharmacopoeia, Butcher’s broom rhizomes should contain at least 1% ruscogenins and the rhizome samples obtained from Bahçeköy, Biga, Karacabey, Poyrazlar, Gönen and Kanlıca were found consistent with this limit. For pilot field cultivation trial, rhizome sections were prepared from the selected rhizome samples by cutting carefully from their knuckles. The sections then were planted in the nursery under 3 different crown closures with three replications (one of which to serve control). However, it was observed that the survival ratio of seedlings, which was 1% in the first year in the nursery, declined even further in the 2nd and 3rd years, and finally the seedlings dried up, neither developed a root system nor formed a rhizome. Consequently, further cultivation studies should be carried out under suitable climatic conditions and soil compositions by directly planting the rhizomes.

Keywords
Ruscus aculeatus L. ruscogenin neoruscogenin stigmasterol cultivation
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© 2018 ACG Publications. All rights reserved.
Original Article

J. Chem. Metrol. (2018) 12:1 ; 70 - 78
by Isin Aydin Unsal, Murat Tasan, Taner Gokcen and Ahmet C. Goren
Abstract

In this study, an ID-LC-MS method was developed and validated for the determination of 14 sulfonamides in milk samples. Recovery results were found to be in the range of 91%-114% for milk samples. The relative measurement uncertainty was between 7.5%- 12.7%. Validated method was performed on milk samples obtained from market and street vendors. The amount of sulfonamides in the analyzed samples was found to be below the legal limits (Sulfamethazine: 6.46±0.76 ng/g and sulfisoxazole: 7.3±0.71 ng/g).

Keywords
Sulfonamides isotope dilution LC-MS/MS method validation uncertainty estimation
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© 2018 ACG Publications. All rights reserved.
Original Article

J. Chem. Metrol. (2018) 12:1 ; 59 - 69
by Siarhei Charapitsa, Svetlana Sytova, Anton Korban, Nicolai Boyarin, Inna Shestakovich and Radomír Čabala
Abstract

An extensive study concerning the problem of volatile compounds determination in alcoholic products by gas chromatography has been undertaken in the paper. A row of gravimetrically prepared standard solutions was analysed with three analytical methods: traditional method of internal standard, advanced method of internal standard and external standard method. The main analytical characteristics and metrological parameters of the “Ethanol as Internal Standard” method were compared with the traditional approaches. It was shown that this method leads to correct values of volatiles concentrations and the corresponding metrological characteristics are generally better.

Keywords
A lcoholic products ethanol gas chromatography quantification volatile compounds
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© 2018 ACG Publications. All rights reserved.
Original Article

J. Chem. Metrol. (2018) 12:1 ; 34 - 58
by Nabawia A. Abdel-Zaher, Manal T.H. Moselhey and Osiris W. Guirguis
Abstract

The aim of the present work was to evaluate the effect of artificial day light for 160 h on silk fabrics dyeing with different conditions such as; different dye bath pH values, different dyeing temperatures, and different dyeing times; of extracted natural dye from Azadirachta indica (neem) leaves. The reflectance spectra of the untreated and treated silk fabrics were followed using spectrophotometer technique. The effects of dyeing conditions in the optical parameters, such as; CIE tristimulus values, color parameters, absorption coefficient as well as extinction coefficient and color strength, were determined before and after exposure. The obtained results indicate that the silk fabrics were found to be highly dependent on either of these different dyeing conditions and/or artificial day light exposure. Also, variations in the values of the optical band gap energy were detected. Improvement in the dyeing process were produced which may be attributed to the induced structural change due to the variation in the chemical bonds in silk fabrics. The present work gives the chance to produce a new traditional natural dye to meet the environmental future demands technology of high quality fantastic dyed pattern.

Keywords
Natural dye neem plant silk fabrics dyeing conditions optical properties
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© 2018 ACG Publications. All rights reserved.