Chemical Analysis of Suspected Unrecorded Alcoholic Beverages from the States of São Paulo and Minas Gerais, Brazil

Negri, Giuseppina; Neto, Julino Assunção Rodrigues Soares; Carlini, E. A.

doi:10.1155/2015/230170

Cited by 9 publications

(3 citation statements)

References 34 publications

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“…On the other hand, the ratio of methanol was found to sequentially decrease from 4% in the first fraction to <0.5% by the sixth fraction. It is worth mentioning that, besides methanol, other compounds (such as acetaldehyde, acetone, ethyl formate, ethyl acetate, n -propanol, sec -butanol, isobutanol, active amyl alcohol, isoamyl alcohol, and n -amyl alcohol , ) are also distilled, accounting for the remaining amounts.…”

Section: Resultsmentioning

confidence: 99%

Analysis of Methanol in the Presence of Ethanol, Using a Hybrid Capillary Electrophoresis Device with Electrochemical Derivatization and Conductivity Detection

et al. 2017

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Concurrently with ethanol, many other compounds can be formed during the fermentation of grains and fruits. Among those, methanol is particularly important (because of its toxicity) and is typically formed at concentrations much lower than ethanol, presenting a particular challenge that demands the implementation of separation techniques. Aiming to provide an alternative to traditional chromatographic approaches, a hybrid electrophoresis device with electrochemical preprocessing and contactless conductivity detection (hybrid EC-CE-CD) is herein described. The device was applied to perform the electro-oxidation of primary alcohols, followed by the separation and detection of the respective carboxylates. According to the presented results, the optimum conditions were obtained when the sample was diluted with 2 mmol L HNO and then electro-oxidized by applying a potential of 1.4 V for 60 s. The oxidation products were then electrokinetically injected by applying a potential of 3 kV for 4 s and separated using a potential of 3 kV and a background running electrolyte (BGE) consisting of 10 mmol L N-cyclohexyl-2-aminoethanesulfonic acid (CHES) and 5 mmol L sodium hydroxide (NaOH). n-Propanol was used as an internal standard and the three carboxylate peaks were resolved with baseline separation within <3 min, defining linear calibration curves in the range of 0.10-5.0 mmol L. Limits of detection (LODs) of 20, 40, and 50 μmol L were obtained for ethanol, n-propanol, and methanol, respectively. To demonstrate the applicability of the proposed strategy, a laboratory-made sample (moonshine) was used. Aliquots collected along the beginning of the fractional distillation presented a decreasing methanol ratio (from 4% to <0.5%) and a growing ethanol ratio (from 80% to 100%) in the collected volume.

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Section: Resultsmentioning

confidence: 99%

Analysis of Methanol in the Presence of Ethanol, Using a Hybrid Capillary Electrophoresis Device with Electrochemical Derivatization and Conductivity Detection

et al. 2017

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“…The cachaça samples with excess copper present levels between 8 and 10 mg L (Lima et al, 2006) or more. Negri et al (2015) found copper levels of up to 28 mg L -1 in the evaluated distillates. The copper content in samples prepared with must fermented with the selected yeast was up to 25.16 mg L -1 ( Figure 4B).…”

Section: Passage Of the Distillate Using One Column Per Blockmentioning

confidence: 87%

Post-treatment of cachaca (Brazilian sugarcane spirit) with charcoal made from cane bagasse

Madaleno¹,

Souza²,

Sugahara³

et al. 2017

Afr. J. Microbiol. Res.

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The objective of this study was to ferment sugarcane juice using two types of yeast and evaluate the quality of the distillate after beverage filtration in a column filled with ground charcoal derived from cane bagasse. The experimental design was randomized block (split plots, 2 x 2) with three replicates. The primary treatment involved two types of yeast: CA-11 and baker's yeast. Secondary treatment involved filtration or not of the beverage in the charcoal column. The following procedures were adopted: percolation of all samples to a single column and passage of the distillate from each repetition (blocks) using three similar columns. Selected yeast had similar cachaça production as compared to the baker's yeast. However, higher acidity occurred in the distillate using the selected yeast, which contributed to the increased transfer of copper to the beverage. In the charcoal filtration that used one column per block, the copper was removed from the beverage, and the acidity was decreased, whereas the alcohol content, fixed acidity, pH, and turbidity of the cachaça did not change.

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“…Cyanogenic glycosides can be found in the whole plants (cabbage, clover, and bamboo) as well as in specific plant parts such as roots (potato, radish, and turnip), grains (sorghum), and fruits (coffee, almond, cashew, seeds, and pits of apple, apricot, peach, and plum) 17,18 . Beverages made with these organisms or plant parts can contain cyanide or cyanogenic glycosides and measureable CN concentrations are expectable 19,20 . A significant interference can be caused by aldehydes like sugars, alpha‐ketoglutarate, acetaldehyde, or benzaldehyde, which decrease the cyanide concentration via cyanohydrin formation 21,22 …”

Section: Introductionmentioning

confidence: 99%

Modified congener analysis: Quantification of cyanide in whole blood, other body fluids, and diverse beverages

Sundermann

Schmitt

Bartel

2020

Drug Testing and Analysis

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The congener analysis is routinely used for the determination of volatile compounds in body fluids and beverages for forensic investigations. Although intoxications with cyanide via smoke inhalation or ingestion of cyanide salts are frequently encountered in forensic medicine, the inclusion of hydrogen cyanide in this analysis was never studied in detail. In this work, a very simple, fast, and sensitive quantification method with headspace gas chromatography and flame ionization detection for the analysis of cyanide in whole blood—was developed and validated. In contrast to the standard sample preparation of the congener analysis, an acidification step with tartaric acid was added. A limit of detection of 50 ng/ml, good linearity (coefficient of correlation > 0.9997), high accuracy (101.5%–106.4%), and precision (relative standard deviation 1.8%–3.7%) were achieved. Authentic blood samples of 10 forensic cases were investigated with the new method. Furthermore, the method was used for the quantification of cyanide in other body fluids (serum and urine) and diverse beverages. Interferences were investigated, and the addition of aldehydes produced a clear concentration‐dependent decrease of the cyanide signal. Besides, the method offers an economical use of limited sample material by the simultaneous determination of cyanide, ethanol, and congener alcohols.

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Chemical Analysis of Suspected Unrecorded Alcoholic Beverages from the States of São Paulo and Minas Gerais, Brazil

Cited by 9 publications

References 34 publications

Analysis of Methanol in the Presence of Ethanol, Using a Hybrid Capillary Electrophoresis Device with Electrochemical Derivatization and Conductivity Detection

Analysis of Methanol in the Presence of Ethanol, Using a Hybrid Capillary Electrophoresis Device with Electrochemical Derivatization and Conductivity Detection

Post-treatment of cachaca (Brazilian sugarcane spirit) with charcoal made from cane bagasse

Modified congener analysis: Quantification of cyanide in whole blood, other body fluids, and diverse beverages

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