Trends in the forensic analysis of cosmetic evidence

Chophi, Rito; Sharma, Spriha; Sharma, Shveta; Singh, Rajinder

doi:10.1016/j.forc.2019.100165

Cited by 36 publications

(30 citation statements)

References 57 publications

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“…The specific gravity was determined according to the method described by Chophi, et al [14]. The 5ml of distilled water was added to the cleaned pycnometer.…”

Section: The Specific Gravity Of the Essential Oilmentioning

confidence: 99%

Physical Characteristics of the Essential Oil Extracted from Released and Improved Lemongrass Varieties, Palmarosa and Citronella Grass

Mieso

Befa

2020

Agriculture and Food Sciences Research

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The grass species lemongrass, palmarosa, and citronella/nardus grass are one of the aromatic and medicinal plants which know days Wondo genet Agriculture center is working on their essential oil yield increment and releasing different varieties. The essential oils were extracted using hydro distillation methods. This study investigated the analysis of physical characteristics of lemongrass varieties, palmarosa, and citronella grass essential oils. From the released three lemongrass varieties WG-Lomisar-Java has the highest oil content (1.25 %± 0.02) and the other two varieties namely Lomisar-I and WG-lomisar-UA (upper awash) have the same oil content (1.2%± 0.02). WG-lomisar-UA (upper awash) has the largest relative density/specific gravity (0.9015± 0.0002) and WG-Lomisar-Java has the smallest value (0.9007± 0.0002). In the case of the refractive index, Lomisar-I has a large value (1.4890± 0.0002) and WG-Lomisar-Java has a small value (1.4870± 0.0002). The oil content of palmarosa was 1.2%± 0.03, the specific gravity was 0.8815± 0.0002 and the refractive index was 1.4720± 0.0002, whereas Citronella grass contains 1.3%± 0.01 oil content, 0.9108± 0.0002 specific gravity, and 1.4800± 0.0002 refractive indexes.

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“…The specific gravity was determined according to the method described by Chophi, et al [14]. The 5ml of distilled water was added to the cleaned pycnometer.…”

Section: The Specific Gravity Of the Essential Oilmentioning

confidence: 99%

Physical Characteristics of the Essential Oil Extracted from Released and Improved Lemongrass Varieties, Palmarosa and Citronella Grass

Mieso

Befa

2020

Agriculture and Food Sciences Research

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“…The specific gravity was determined according to the method described by [27]. The 5ml of distilled water was added to the cleaned pycnometer.…”

Section: Specific Gravity Of the Essential Oilmentioning

confidence: 99%

“…The refractive indexes of the essential oils were measured by a refractometer (Reichert, AR200) according to the method described by [27,28]. The prism of the digital spectrophotometer was cleaned, and the red button was pressed first to make sure that it was cleaned well.…”

Section: Specific Gravity Of the Essential Oilmentioning

confidence: 99%

Effect of Drying Method and Storage Days on Essential Oil Yield and Quality of Rue (Ruta Chalepensis) leaves

Befa¹

2021

JNFP

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The genus Rue (Ruta chalepensis) is an aromatic medicinal plant used in the folk as an herbal remedy medicine for the treatment of a variety of disorders in Ethiopia. Information about the effects of drying methods and storage days on essential oil physical properties is limited. The fresh leaf of rue was collected from the Wondo Genet Agriculture research center and was subjected to sun and shade drying methods and four storage days (0,5,10, and 15) days for each day's moisture content and essential oil extraction using hydro distillation. The obtained essential oils were analyzed for physical properties (specific gravity and refractive index). The highest value of moisture content in percent was recorded at 0-day storage days with the value of 73.533 and the lowest one was recorded at 15-day sundry with the value of 8.400. The highest and lowest value of essential oil content in volume by weight in percent was 0.673 and 0.174 at 0 day and 10-day sun, respectively. The highest and lowest value of essential oil content weight by weight in percent was 0.996 and 0.287 at 0 day and 15-day sun, respectively. The results showed that the rue dried under shade had a higher level of moisture content, essential oil content, volume by weight and weight by weight, specific gravity, and refractive index compared to the rue leaf dried under sun-drying methods. In the case of storage days in all parameters except refractive index and specific gravity, the rue fresh leaf (0 days) was higher in moisture content and essential oil contents compared to others storage days. This study provides evidence that drying herbs for different storage days and different drying methods affect the essential oil content and physical properties of essential oil.

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“…19 Nickel has been investigated in forensic science in counterfeit watches and coins, [20][21][22] human teeth involved crimes, 23 illicit cocaine, 24 prints on cartridge casings and shotgun shells, 25 and cosmetic evidence. 26 Several techniques were used in the analysis such as XPS, XRF, XRD, ICP-MS, and simple chemical modification. 21,24,[27][28][29][30][31][32][33] Herein, we bridge the gap between previous works on diazonium modification of copper and our approach applying diazonium gold to surfaces and their analyses by XPS to tackle the latent fingerprint development on nickel coins.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous redox route for gold‐aryl film development of latent fingerprints on nickel coins

Almheiri

Ahmad

Droumaguet

et al. 2021

Surface & Interface Analysis

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Surface modifiers through redox routes emerged as the most preferred in forensic science. Aryldiazonium salts stabilized with tetrachloroaurate (III) are excellent redox modifiers in the development of latent fingerprints on nickel surfaces. Nickel coins were fingerprinted and developed with a stable diazonium salt [O 2 N-4-C 6 H 4 N≡N] AuCl 4 . The developed surfaces were studied using XPS that showed the presence of the characteristic gold and organic modifier peaks. Also, imaging analysis using SEM showed clusters of gold. EDS quantitative analysis estimated a good amount of gold presence on the fingerprinted compared with the non-fingerprinted area. Our results are important in the analysis of nickel coins using a spontaneous route by simply depositing diazonium salt solution drops on the nickel surface without any additional reducing agent. This work brings strong supporting evidence for the efficient combination of diazonium surface chemistry and high-performance surface analytical tools (XPS, SEM-EDS) in the fast, spontaneous development of fingerprints and their morphological and chemical composition assessments.

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Trends in the forensic analysis of cosmetic evidence

Cited by 36 publications

References 57 publications

Physical Characteristics of the Essential Oil Extracted from Released and Improved Lemongrass Varieties, Palmarosa and Citronella Grass

Physical Characteristics of the Essential Oil Extracted from Released and Improved Lemongrass Varieties, Palmarosa and Citronella Grass

Effect of Drying Method and Storage Days on Essential Oil Yield and Quality of Rue (Ruta Chalepensis) leaves

Spontaneous redox route for gold‐aryl film development of latent fingerprints on nickel coins

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