25 June 2013, Volume 38 Issue 3
    

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  • LIU Shuo, LIU Bing, WANG Yan-bin, et al
    Forensic Science And Technology. 2013, 38(3): 3-8.
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    With rapid development and wide application, forensic DNA typing has reshaped the field of forensic science and criminal investigation. However, the Results produced by DNA laboratories have less confidence as DNA evidence due to lower laboratory quality assurance capacity and inadequate quality control measures. This paper summarizes the overall quality assurance and quality control measures within foreign forensic DNA laboratories, in order to attain pragmatic approaches to optimize the standardization of nationwide DNA identification.
  • ZHANG Guang-feng, CHEN Song, TU Zheng, et al
    Forensic Science And Technology. 2013, 38(3): 9-13.
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    In this paper, the factors affecting the success rate of touch DNA detection, including individual difference, physical character of the substrate, touch time, persistence period, choice of the analysis method and interpretation of DNA profile were discussed.
  • QIAN Zhen-hua, XU Peng, LIU Ke-lin, et al
    Forensic Science And Technology. 2013, 38(3): 14-18.
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    In this paper, the concept, history, common kinds and two most popular designer drugs were introduced. The authors hope that forensic scientists pay a more attention to designer drugs and have more knowledge about designer drugs.
  • ZHOU Xiao-feng, ZHANG Ling-yan
    Forensic Science And Technology. 2013, 38(3): 19-23.
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    In this paper, the study status of latent fingerprints detection by nanoparticles, both in solution or as powders, were summarized and the utilization of metal nano-materials, metal oxides nano-materials in fingerprints detection were described in detail.
  • XING Ruo-kui, WEN Jin-feng, WANG Song-cai, et al
    Forensic Science And Technology. 2013, 38(3): 24-27.
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    Objective To set up a approach to distinguish the residues of gasoline and thinner in fire debris samples.Methods The fire debris samples were analyzed with ATD-GC-MS, the ion profiles of aromatics, alkanes, indan and naphthalene were compared with the spectral of gasoline standard and thiner standard, and the degree of similarity was calculated with Vectorial Angle method.Results There were some differences between the residues of thinners and gasoline although some specific thinners residues were very similar to gasoline.Conclusion The residues of thinners and gasoline in fire debris samples can be distinguished using the approach presented in the study.
  • SU Qin, WANG Shun-xia, ZHANG Yu-ting, et al
    Forensic Science And Technology. 2013, 38(3): 28-29.
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    Objective To explore a effective method for detecting latent bloodstains on washed fabrics.Methods Bloodstains on cotton fabric and synthetic fabric washed with different intensity were detected by Benzidine test, Luminol test and TL-445 laser biology sample detect instrument.Results Some of latent bloodstains on cotton fabrics were detected by Benzidine test, all stains on cotton fabrics were detected by Luminol test, and all stains on cotton fabrics and synthetic fabric were detected by TL-445 laser biology samples detect instrument.Conclusion TL-445 laser biology samples detect instrument is more sensitive to find latent bloodstains on washed fabrics.
  • HUANG Jian, ZHANG Yun-feng, CHANG Jing, et al
    Forensic Science And Technology. 2013, 38(3): 30-32.
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    Objective To study an analytical method for determination of lincomycin in blood.Methods The samples were extracted by SPE and then analyzed by HPLC with ACQUITY UPLC○R HSS T3 column and electron spray ionization.Results Average recovery rate of lincomycin ranged from 104.98 to 120.74%. Based on a signal-to-noise ratio of 3∶1, the detection limit was 55.4 pg/ ml.Conclusion This method is sensitive, accurate and can be used in casework.
  • CHEN Xue-guo, LI Wei-liang, ZHU Yu, et al
    Forensic Science And Technology. 2013, 38(3): 33-35.
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    Objective To present a method for analyzing 14 kinds of composite herbicides in water samples.Methods Water samples were extracted with C18 solid-phase column, the eluents were analyzed by liquid chromatography and ion trap electro-spray mass spectrometry.Results Good linear ranges were obtained for all herbicides with the correlation coefficients of 0.995-0.998,and the detection limits were 0.005~0.045μg/mL. The average recoveries of 14 kinds of composite herbicides in water samples ranged from 70.5~110.2%, the average intra-day and inter-day relative standard deviations were less than 10.2% and 14.4%, respectively.Conclusion This method has high accuracy, good precision and sensitivity, and can be applied in the identification of composite herbicides in casework.
  • LI Yi, SHEN Xiu-hua, SHU Ke
    Forensic Science And Technology. 2013, 38(3): 36-41.
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    Objective To establish a rapid and accurate method for Simultaneous qualitative and quantitative analysis of common poisons.Methods 57 kinds of common toxicants were analyzed by GC/MS. Results A user��s library of QED spectrum of 57 kinds of toxicants was obtained and the parameters of selected reaction monitoring were optimized.Conclusion This method is rapid, sensitive and accurate. With this method, the qualitative and quantitative testing can be completed in a single scan.