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Phthalic acid esters (Phthalate two esters, PAEs) chemical structure is composed of a rigid planar aromatic hydrocarbons and linear aliphatic side chains of with two plastic, it is usually colorless viscous oil like liquid [2].
Binding is not covalent chemistry between the adjacent benzene two formic acid ester and polymer, but combined with each other to maintain physical, chemical properties of the respective independence, thus with the passage of time, this kind of material will gradually from the material escape, pollute the air, soil, water and food, the adjacent benzene two formic acid ester in the human body can be gradually accumulated and can be decomposed into corresponding metabolites were further harm to human health [2].
Shao Dongliang used the method for the detection of drug in 16 kinds of phthalic acid ester compounds ,its limit of detection concentration is 0.05mg/kg, the linear range of the method is 0.5-5.0mg/L, recovery rate of sample was 80.0%-95.0%, the relative standard deviation is 2.1%-7.0% (n=6). 3.4 Liquid chromatography-mass spectrometry ( HPLC-MS) HPLC-MS is a kind of widely adaptive detector, MS can detect almost all compounds, relatively easy to solve the problem of the analysis of thermally unstable compounds; separation ability is strong, even in the chromatography is not completely separated, but through the characteristics of ion chromatogram of MS also were painted their chromatograms to carry out qualitative and quantitative, can structural information and molecular rich gives each component, and very reliable quantitative structure; low detection limit, MS has high sensitivity, can detect the sample in the <10-12 under the G level, through the choice of ion detection mode, the

Sidorko Department of Physical Chemistry of Inorganic Materials, Institute for Problems of Materials Science, Kyiv 03180, Ukraine vdybkov@ukr.net, vdybkov@ipms.kiev.ua Keywords: Fe-Cr alloys, boride layers, phase identity, chemical composition, growth kinetics.
The structure of boride layers on the surface of Fe-25% Cr alloy samples proved to be more complicated.
Hence, compositionally the outer boride layer actually comprises the (Fe,Cr)B and (Cr,Fe)B phases, although X-ray diffraction analysis practically does not show the presence of the CrB phase, probably because, firstly, the FeB and CrB phases have very similar crystal structures [1,8] and, secondly, under non-equilibrium conditions the lattice rearrangement is not completed in view of time limitations.

The eggshell is made up of laminated structures that are mammillary cone layer, palisade layer and cuticle [1, 5].
The eggshell: structure, composition and mineralization.Front.biosci. 17: 1266-1280
ACS sustainable chemistry and engineering, 2(10), pp. 2329–2337

The mechanical properties of nickel-based superalloys depend on the grain structure, γʹ volume fraction, γ/γʹ eutectic and various types of secondary phases, such as carbides and borides [8], and how these features may be manipulated to enhance the properties for specific applications [9].
Tin, Nickel-Based Superalloys for Advanced Turbine Engines: Chemistry, Microstructure and Properties, J.
Attallah, The influence of the laser scan strategy on grain structure and cracking behaviour in SLM powder-bed fabricated nickel superalloy, J.

As bone is a material with hierarchical structure, when investigating its mechanical properties, it is first necessary to determine what structural level of organization should be investigated [1], its structural heterogeneity varies with the scale of magnification employed.
A part of the rest of each femoral head was dehydrated, defatted and grinded to analyze the powder by Scanning Electronic Microscope (SEM, RDCM- INTI) and by X-Ray Diffractometry (DRX, - Research and Development Centre on Chemistry RDCC - INTI).
[14] Padilla, G., Jenson, F., Bousson, V., Peyrin, F., Laugier, P., Relationships of trabecular bone structure with quantitative ultrasound parameters: in vivo study on human proximal femur using transmission and backscattering measurements, Bone Vol.42 (2008) 1993-1202

Martin et al (2013) [7] illustrated that the properties of MWCNT/PEEK enhanced with heat treatment due to the increase in the volume fraction of crystalline structure.
Bracco, Characterization of thermally annealed PEEK and CFR-PEEK composites: Structure-properties relationships, Polymer Degradation and Stability, 136 (2017)121-130
Tahriri, Synthesis, Characterization, and in Vitro Bioactivity of Sol-Gel-Derived SiO2-CaO-P2O5-MgO-SrO Bioactive Glass, Synthesis and Reactivity in Inorganic, Metal-Organic, and Nano-Metal Chemistry, 44 (2014)692-701

The epoxidation of NR was confirmed by analyzing the chemical structures of NR and ENR using FT-IR analysis.
The chemical and morphology structure of ENR 30 were confirmed by FT-IR spectra and TEM images, respectively.
Ikeda (Eds.), Chemistry, Manufacture and Applications of Natural Rubber, Woodhead Publishing, India, 2014, pp.249-283

The composite at (F= 10 Hz, DC= 25 %) had a finer grain size embedding lower porosity of the coating and greater compact structure.
The incorporation of TiO2 nanoparticles degree was increased too in the plating bath renders the Nickel matrix with finer grain size embedding lower porosity of the coating and greater compact structure and consequently more resistant to generalized corrosion and leading to a reduction in the corrosion current.
Shi, Microstructure and characterization of Ni-Co/Al2O3 composite coating by pulse reversal electrodeposit, Materials Chemistry and Physics 100 (2006) 395-399

A certain amount bainite structure can be obtained by accelerated cooling, and the existence of bainite can obviously increase the strength and the elongation and yield ratio is satisfactory.
From Figure 3, it can be seen that all bainite structure consist of ferrite lath for the tested steels with different manganese contents; however, it is different in the width and length of bainite ferrite laths.
Hodgson, The Effect of Chemistry on the Formation of Ultrafine Ferrite in Steel, ISIJ International 39 (1999) 1176-1180

The engineering applications of the silicone foam requires firm bonding with the substrate, but it’s more important, beside of the compatibility of the adhesive, the base material and the long-term storage stability of adhesion, that the silicone foam can maintain the integrity of the original foam structure as much as possible to provide uniform mechanical properties.
[6] Shi Pingan, Yin Yihui, Wang Jun, Fu Chunyu, Niu Wei, A study on the stress relaxation properties of silicone foam cushion in composite structure, Acta Mechanica Solida Sinica, (27)2006:18-23(in Chinese) [7] Li Guangliang, Organic silicon polymer chemistry, Science Press(in Chinese), 1999