Characterization of Heroin: A Preliminary Study

1970 ◽  
Vol 53 (6) ◽  
pp. 1137-1139
Author(s):  
M J Pro ◽  
R L Brunelle
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Chemical Analysis ◽  
Neutron Activation ◽  
Chemical Elements ◽  
Analytical Techniques ◽  
Preliminary Examination ◽  
Preliminary Study

Abstract Heroin samples from 100 actual cases were examined by multiple analytical techniques. After preliminary examination by microscopy and chemical analysis indicated similarity of questioned and known specimens, as many as 22 chemical elements were measured by neutron activation analysis and atomic absorption. Since illicit heroin is crudely produced, the qualitative elemental analysis is significant; however, more important for characterization purposes is the quantitative determination of the elements found because the concentration ranges for each element are extremely large.

Determination of chemical elements in magnesium-based materials by neutron activation analysis

2021 ◽  
Vol 9 (1A) ◽  
Author(s):  
Caio Almeida Justino Silva ◽  
Lilian Ninoska Muriel Braguin ◽  
Jesualdo Luiz Rossi ◽  
Isolda Costa ◽  
Mitiko Saiki
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Chemical Elements

scholarly journals DETERMINATION OF MINERALS CONTENT IN LEAVES OF MORINGA OLEIFERA BY NEUTRON ACTIVATION ANALYSIS

2018 ◽  
Vol 21 (1) ◽  
pp. 11 ◽  
Author(s):  
Theresia Rina Mulyaningsih ◽  
Saeful Yusuf
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Mineral Composition ◽  
Moringa Oleifera ◽  
Mineral Content ◽  
Essential Minerals ◽  
Central Java ◽  
Preliminary Study

DETERMINATION  OF  MINERALS  CONTENT  IN  LEAVES  OF  MORINGA  OLEIFERA  BY  NEUTRON ACTIVATION ANALYSIS. Moringa oleifera ( Mo) or kelor is a high-value plant,  distributed in many tropical and subtropical countries. This plant can be used as a vegetable,  cosmetic oil, and medicinal plant. The leaves of Mo is rich in essential minerals needed by the body’s health. Moringa oleifera widely cultivated in various places  in  Indonesia,  easily  obtained  and  inexpensive  so  precious  can  be  used  to  overcome  malnutrition. Research on the macro-micro mineral content in Moringa leaves here is still limited. Mineral composition in leaves include  Mo  leaves varies depending on location grow. The purpose of this research is to determine the mineral content in the  leaves of  the Mo  taken from Indonesia. For the preliminary study samples was taken from Central Java to be compared with the results of studies conducted in several other countries. Leaf samples were collected randomly from sampling area. Mineral content in the samples is determined using  Neutron  Activation  Analysis (NAA). Irradiation was carried out at rabbit system of Multipurpose Reactor G.A Siwabessy on neutron flux ~1013 n.cm-2.dt-1. The results obtained  indicate that Mo is rich in  essential minerals, mainly  Ca, Mg, K, Zn, Fe and Cl. Content in dried leaves include: calcium (3.45 % ), magnesium (0.66 %), potassium (3.35 %), chloride (0,25%), iron (147.20 mg/kg), sodium ( 152.52 mg/kg ), zinc (35.71 mg/kg), and manganese (102.10 mg/kg). Mo also contains other minerals such as chromium (4.76 mg/kg), bromine (4.82 mg/kg), cobalt (0.16 mg/kg), and aluminium (150.40 mg/kg) in addition to other element. Compared with the results of existing studies, it shows that mineral composition in Mo leaves varies depending on the location where the plant is grown.

Quantitative determination of hafnium in mixtures of zirconium–hafnium hexachloro alkali compounds by neutron activation analysis and X-ray fluorescence

1983 ◽  
Vol 61 (9) ◽  
pp. 2189-2191 ◽  
Author(s):  
C. A. Pickles ◽  
G. J. Kipouros ◽  
S. N. Flengas ◽  
R. G. V. Hancock
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Quantitative Determination ◽  
Analytical Techniques ◽  
X Ray ◽  
Alkali Compounds

A procedure for the determination of Hf in both mixtures of HfCl4–ZrCl4 and A2HfCl6–A2ZrCl6, where A = Li, Na, K, Rb, or Cs, is described. The method involves conversion of the chlorocompounds into HfO2–ZrO2 mixtures and subsequent analysis by either X-ray fluorescence or neutron activation analysis. The two analytical techniques are compared with regard to accuracy and simplicity.

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