scholarly journals VERIFICATION OF THE DETERMINATION OF 12 MEV ELECTRON BEAM OUTPUT VERSA HD / 154714 LINEAR SPEEDING PLANE IN MAYAPADA HOSPITAL

2020 ◽  
Vol 14 (1) ◽  
pp. 31
Author(s):  
Assef Firmando Firmansyah
Keyword(s):  
Linear Accelerator ◽  
Primary Standard ◽  
Reference Conditions ◽  
Measurement Tool ◽  
Standard Laboratory ◽  
Ionization Detector ◽  
Energy Beam ◽  
Beam Output ◽  
Absolute Measurements

VERIFICATION OF THE DETERMINATION OF THE NOMINAL ENERGY BEAM OUTPUT OF THE 12 MEV LINEAR ACCELERATOR PLANE ELEKTA VERSA HD / 154714 AT MAYAPADA HOSPITAL. This paper describes verifying the determination of the 12 MeV nominal energy beam electron water absorption dose emitted from the Elekta Versa HD / 154714 medical linear accelerator owned by Mayapada Hospital, Lebak Bulus, Jakarta. Measurements were done in the 1D water phantom Scanner under reference conditions with the distance of the radiation source to the surface of the water 100 cm and the radiation field formed by the applicator 10 cm x 10 cm and the depth corresponding to (0.6 R50 - 0.1) cm. The IBA CC13 ionization detector is used as a radiation measurement tool for PDD measurements, while the Roos parallel ionization detector is used for absolute measurements. Roos's parallel ionizer detector is aligned with PTKMR-BATAN's PTW Webline electrometer. This detector is also traced to the primary standard laboratory of BIPM, France. Meanwhile, the PCC04 chip ionizing detector parallel to the PCC04 is coupled with a Dose 1 electrometer owned by Mayapada Hospital, which is traced to the PTB primary standard laboratory. Calculation of measurement results is carried out using the IAEA dosimetry protocol contained in Technical Report Series No. 398. The results obtained indicate a fairly good fit between the two measurements with a difference of 0.3%

Determination of electron beam output factors for a 20-MeV linear accelerator

1985 ◽  
Vol 12 (4) ◽  
pp. 473-476 ◽  
Author(s):  
Michael D. Mills ◽  
Kenneth R. Hogstrom ◽  
Robert S. Fields
Keyword(s):  
Electron Beam ◽  
Linear Accelerator ◽  
Beam Output ◽  
Output Factors

Determination of Electron Beam Output Factors For A 14-Mev Linear Accelerator (Phillips Sl75/14n)

2007 ◽  
Vol 23 (3-4) ◽  
pp. 137-138
Author(s):  
Vuyisile Jonas ◽  
F.C.P. du Plessis ◽  
C.A. Willemse
Keyword(s):  
Electron Beam ◽  
Linear Accelerator ◽  
Beam Output ◽  
Output Factors

Determination of nitrogen compounds in gasoline by gas chromatography-surface ionization detector

2011 ◽  
Vol 29 (2) ◽  
pp. 141-145
Author(s):  
Weiwei LI ◽  
Kun DING ◽  
Hua WANG ◽  
Shiheng CHEN ◽  
Zheng SHEN ◽  
...  
Keyword(s):  
Gas Chromatography ◽  
Nitrogen Compounds ◽  
Surface Ionization ◽  
Ionization Detector

scholarly journals Characterization and Quantification of Selenoprotein P: Challenges to Mass Spectrometry

2021 ◽  
Vol 22 (12) ◽  
pp. 6283
Author(s):  
Jérémy Lamarche ◽  
Luisa Ronga ◽  
Joanna Szpunar ◽  
Ryszard Lobinski
Keyword(s):  
Mass Spectrometry ◽  
State Of The Art ◽  
Animal Health ◽  
Primary Standard ◽  
Selenoprotein P ◽  
Primary Standards ◽  
Analytical Approaches ◽  
Careful Investigation ◽  
Accurate Quantification

Selenoprotein P (SELENOP) is an emerging marker of the nutritional status of selenium and of various diseases, however, its chemical characteristics still need to be investigated and methods for its accurate quantitation improved. SELENOP is unique among selenoproteins, as it contains multiple genetically encoded SeCys residues, whereas all the other characterized selenoproteins contain just one. SELENOP occurs in the form of multiple isoforms, truncated species and post-translationally modified variants which are relatively poorly characterized. The accurate quantification of SELENOP is contingent on the availability of specific primary standards and reference methods. Before recombinant SELENOP becomes available to be used as a primary standard, careful investigation of the characteristics of the SELENOP measured by electrospray MS and strict control of the recoveries at the various steps of the analytical procedures are strongly recommended. This review critically discusses the state-of-the-art of analytical approaches to the characterization and quantification of SELENOP. While immunoassays remain the standard for the determination of human and animal health status, because of their speed and simplicity, mass spectrometry techniques offer many attractive and complementary features that are highlighted and critically evaluated.

scholarly journals Determination of Dyclonine Hydrochloride by a HPLC Method and Camphor and Menthol by a GC Method in Compound Lotion

2013 ◽  
Vol 2013 ◽  
pp. 1-4
Author(s):  
Suying Ma ◽  
Haixia Lv ◽  
Xiaojun Shang
Keyword(s):  
Retention Time ◽  
High Performance ◽  
High Performance Liquid Chromatographic ◽  
Reversed Phase ◽  
Hplc Method ◽  
Ionization Detector ◽  
Uv Detector ◽  
Flame Ionization ◽  
Liquid Chromatographic

A high performance liquid chromatographic (HPLC) method with UV detector for the determination of dyclonine hydrochloride and a gas chromatography (GC) method with flame ionization detector (FID) for the determination of camphor and menthol in lotion were developed. The developed HPLC method involved using a SinoChoom ODS-BP C18reversed-phase column (5 μm, 4.6 mm × 200 mm) and mobile phase consisting of acetonitrile : water : triethylamine in a ratio of 45 : 55 : 1.0; pH was adjusted to 3.5 with glacial acetic acid. The developed GC method for determination of camphor and menthol involved using an Agilent 19091J-413 capillary chromatographic column (30 m × 320 μm × 0.25 μm). The two methods were validated according to official compendia guidelines. The calibration of dyclonine hydrochloride for HPLC method was linear over the range of 20–200 μg/mL. The retention time was found at 6.0 min for dyclonine hydrochloride. The calibration of camphor and menthol of GC method was linear over the range of 10–2000 μg/mL. The retention time was found at 2.9 min for camphor and 3.05 min for menthol. The proposed HPLC and GC methods were proved to be suitable for the determination of dyclonine hydrochloride, camphor, and menthol in lotion.

Sign in / Sign up

Export Citation Format

Share Document