“…There was no significant difference between the mass of nitrophenols accumulated by the HSAC-DGT sampler and the theoretical mass calculated using the DGT equation from the solution concentrations, indicating that the uptake behaviour of HSAC-DGT samplers for nitrophenols is consistent with the theoretical DGT technique. The values of C DGT / C SOLN for ONP, PNP, and DNP were 0.962 ± 0.046, 0.944 ± 0.051, and 0.970 ± 0.031, respectively (the typical range is 0.9–1.1) [48], [49]. These results demonstrate that neglecting the DBL in the DGT equation does not introduce a notable error between the theoretical and experimental curves; further, HSAC is deemed suitable as a DGT binding agent for the measurement of nitrophenols in synthetic solutions.Fig.…”
“…There was no significant difference between the mass of nitrophenols accumulated by the HSAC-DGT sampler and the theoretical mass calculated using the DGT equation from the solution concentrations, indicating that the uptake behaviour of HSAC-DGT samplers for nitrophenols is consistent with the theoretical DGT technique. The values of C DGT / C SOLN for ONP, PNP, and DNP were 0.962 ± 0.046, 0.944 ± 0.051, and 0.970 ± 0.031, respectively (the typical range is 0.9–1.1) [48], [49]. These results demonstrate that neglecting the DBL in the DGT equation does not introduce a notable error between the theoretical and experimental curves; further, HSAC is deemed suitable as a DGT binding agent for the measurement of nitrophenols in synthetic solutions.Fig.…”
“…Finally, because our country's diet was mainly grain, these plant foods phytic acid and oxalic acid could be combined with dietary calcium minerals into insoluble salts, directly hinder their absorption which maked our population generally lack of calcium. Because the bone mud was rich in calcium, which could be bone liver sauce as a functional products role with calcium role [19] .…”
Section: Bone Mud Liver Sauce Development Directionmentioning
“…The principle of DGT has been described extensively in the literature [11,12]. Although DGT was originally designed for environmental analysis, several other applications of DGT are currently being developed [13,14]. At present, in combination with instrumental methods, more than 50 elements can be determined by DGT [15]; studies have also been performed, exploring its use in Hg determination [16][17][18][19][20][21][22].…”
Section: Introductionmentioning
confidence: 99%
“…Purolite S924 is a polystyrene-based resin with thiol functional groups, which could be used as a possible replacement for currently used binding gel containing 3-mercaptopropyl silica gel particles. The need to develop DGT application capabilities for analysis of high salinity condiments was mentioned in a recent study of Chen et al [14], investigating the application of DGT for the determination of lead in soybean sauce. At present, however, the application of the DGT in food analysis has not been explored, although it offers exciting options for separating the analyte from a complicated matrix of food samples and provides several other benefits in the analytical process.…”
The analysis of mercury in food presents a challenge for analytical chemists. Sample pre-treatment and the preconcentration of mercury prior to measurement are required, even when highly sensitive analytical methods are used. In this work, the Diffusive Gradients in Thin Films technique (DGT), combined with thermal decomposition gold amalgamation atomic absorption spectrometry (TDA-AAS), was investigated for the determination of the total dissolved mercury in fish sauces. Moreover, a new type of binding gel with Purolite S924 resin was used in DGT. Linearity assays for DGT provided determination coefficients around 0.995. Repeatability tests showed a relative standard deviation of less than 10%. pH values in the range of 3–6, as well as NaCl concentrations up to 50 g·L−1, did not affect the performance of DGT. The effective diffusion coefficient of mercury in five-fold diluted fish sauce was determined to be (3.42 ± 0.23)·10−6 cm2·s−1. Based on the 24 h deployment time of DGT, the limit of detection (LOD) for the investigated method was 0.071 µg·L−1. The proposed method, which combines DGT and TDA-AAS, allows for the analysis of fish sauces with mercury concentrations below the LOD of TDA-AAS, and significantly reduces the wear and corrosion of the TDA-AAS components.
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