Abstract:
:In this study, a new method was developed for the pre-concentration of trace mercury from seafood samples prior to analysis by spectrophotometry. The method is based on the complexation between 2-hydrazinobenzothiazole (2-HBT)-modified copolymer(s) and Hg(II) in the presence of an ionic surfactant, cetyltrimethylammonium bromide (CTAB), as sensitivity enhancer at pH 4.5 and the extraction of the complex into the surfactant-rich phase of polyethylene glycol tert-octylphenyl ether (Triton X-114) as the extractant. The variables affecting extraction efficiency were evaluated and optimized. Due to the observation that the modified copolymers are 2.5-fold more sensitive and selective to the Hg2+ ions than the CH3Hg+, the amounts of free Hg2+ and total Hg were determined at 325 nm by spectrophotometric detection of free Hg2+ and total Hg in the pre-treated and extracted fish samples using dilute acid mixture containing Triton X-114 and K2Cr2O7, before and after oxidation of CH3Hg+ to Hg2+ with mixture of KBr and KBrO3 in the acidic media. The amount of CH3Hg+ was calculated from the difference between total Hg and free Hg2+ amounts. The accuracy was tested by analysis of two certified samples. The results were statistically in good agreement with the certified values, and the precision was lower than 6.4%. The limits of detection were 1.40 (1.58) and 1.91 (2.11) μg L-1 for Hg2+ from the two calibration solutions spiked before the pre-treatment, respectively. It has been observed that there is no significant matrix effect by comparison of slopes of the calibration curves. The method was applied to seafood samples for speciation analysis of free Hg2+ and CH3Hg+. In terms of speciation, while total Hg is detected in the range of 12.6-143.8 μg kg-1, the distribution of mercury in seafood was in the range of 7.4-53.3 μg kg-1 for CH3Hg+ and in 8.3-90.5 μg kg-1 for free Hg2+.
journal_name
Biol Trace Elem Resjournal_title
Biological trace element researchauthors
Zengin HB,Gürkan Rdoi
10.1007/s12011-018-1614-5subject
Has Abstractpub_date
2019-09-01 00:00:00pages
254-268issue
1eissn
0163-4984issn
1559-0720pii
10.1007/s12011-018-1614-5journal_volume
191pub_type
杂志文章abstract::Electron energy loss spectroscopy (EELS) is a high spatial resolution electron microscopic technique with the potential to quantify elements at the subcellular level. The presence of each element is demonstrated by the electron energy loss edge at the energy characteristic of that element. The area of the edge may ind...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/BF02916819
更新日期:1994-01-01 00:00:00
abstract::In this article, we report the results of a case control study carried out on 290 Turkish pregnant women at 5-24 wk of gestation to determine their zinc, folic acid, and vitamin B12 levels in relation to their nutritional and socioeconomic status. The women were divided into two groups (n=145 each), depending on the s...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1385/BTER:109:2:105
更新日期:2006-02-01 00:00:00
abstract::Calcium, phytic acid, polyphenols and fiber are major inhibitors of iron absorption and they could be found in excess in some diets, thereby altering or modifying the iron nutrition status. The purpose of this study is to evaluate the effect of calcium, tannic acid, phytic acid, and pectin over iron uptake, using an i...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-014-9911-0
更新日期:2014-04-01 00:00:00
abstract::The concentrations of various trace elements in amniotic fluid (AF) change over the course of pregnancy, with gestational age and fetus growth. The aim of the present study was to evaluate the concentrations of selected essential and toxic elements in AF and their relations to maternal and fetal parameters. The study ...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-015-0557-3
更新日期:2016-07-01 00:00:00
abstract::This review discusses the development of studies that evaluated the essentiality and requirements of iron from the ancient to the present. The therapeutic effects of iron compounds were recognized by the ancient Greeks and Romans. The earliest recognition of the essentiality of iron was stated by Paracelsus, a disting...
journal_title:Biological trace element research
pub_type: 历史文章,杂志文章,评审
doi:10.1007/s12011-018-1584-7
更新日期:2019-03-01 00:00:00
abstract::This study was aimed to evaluate the oxidant-antioxidant imbalance in the pathogenesis of chronic obstructive pulmonary disease (COPD) in Tunisians. We assessed 16 parameters related to the oxidative status that include malondialdehyde (MDA), total protein carbonyls (PCs), and advanced oxidation protein products (AOPP...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-014-0087-4
更新日期:2014-10-01 00:00:00
abstract::In vivo X-ray fluorescence (XRF) techniques were used for biological monitoring of lead, cadmium, and mercury. Lead accumulates in bone, the level of which may thus be used for monitoring of exposure. However, there was no close association between lead levels in bone and exposure time, partly because of differences i...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/BF02796636
更新日期:1987-08-01 00:00:00
abstract::Kashin-Beck disease (KBD) is an endemic, degenerative osteoarthropathy, and particularly seen in China. A deficiency of selenium and iodine is implicated as the main etiological factor for KBD. This meta-analysis aimed to evaluate the differences in the selenium and iodine levels between patients with KBD and healthy ...
journal_title:Biological trace element research
pub_type: 杂志文章,meta分析
doi:10.1007/s12011-015-0463-8
更新日期:2016-03-01 00:00:00
abstract::The effect of certain inorganic and coordinated nickel compounds on the resistance to different destructive substances, rheological properties, and functional activity of healthy human red blood cells (RBC), was investigated. It is shown that nickel compounds affect the erythrocyte membrane lipid bilayer, as well as m...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/BF02917273
更新日期:1989-07-01 00:00:00
abstract::Osteoblast L-type voltage-dependent calcium channels (VDCC) play important roles in maintaining intracellular homeostasis and influencing multiple cellular processes. In particular, they contribute to the activities and functions of osteoblasts (OBs). In order to study how L-type VDCC modulate calcium ion (Ca(2+)) hom...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-014-0118-1
更新日期:2014-12-01 00:00:00
abstract::A simple, quick procedure has been developed for preparation of human lenses for total chromium (Cr) analysis by electrothermal atomic absorption spectrometry (EAAS). This procedure involves wet ashing in a mini-autoclave with HNO3 and H2SO4. Recovery was 101.6%. This procedure is simple to carry out, does not generat...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/BF02784598
更新日期:1992-01-01 00:00:00
abstract::Changes in the macro and trace element composition of saliva might be indicative for pathological changes in periodontal tissues. However, there is a lack of evidence in the literature showing associations between mineral elements and periodontal status. The aim of this study was to determine whether such associations...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-019-01977-z
更新日期:2020-09-01 00:00:00
abstract::Human serum butyrylcholinesterase (BChE) has been converted into a stable but less active desensitized form when heated at 45 degrees C for 24 h. The desensitized BChE follows Michaelis-Menten kinetics, whereas native enzyme exhibits slightly negative cooperativity with respect to butyrylthiocholine binding. In this s...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1385/BTER:93:1-3:55
更新日期:2003-07-01 00:00:00
abstract::The effect of manganese (Mn) supplementation on bone mineral density (BMD) and bone metabolism parameters was determined in ovariectomized Sprague-Dawley rats. Rats were divided into four groups (OVX, OVX+Mn, sham, sham+Mn) and fed with different intake levels of manganese (adequate 0.001% Mn, supplementation 0.01% Mn...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-008-8119-6
更新日期:2008-07-01 00:00:00
abstract::Glucose metabolism is altered after trauma and those factors that affect glucose metabolism often affect chromium (Cr) metabolism and excretion. To ascertain whether urinary Cr excretion is affected by the elevated serum glucose and other factors associated with trauma, the serum glucose and urinary Cr and Creatinine ...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/BF02989239
更新日期:1984-08-01 00:00:00
abstract::Some studies have found that nano-sized titanium dioxide (nano-TiO2) has adverse effects on the male reproductive system. Blood-testis barrier (BTB), as one of the tightest blood-tissue restriction, is crucial to the male reproductive system. However, the potential effects on BTB and signaling pathway changes in testi...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-020-02404-4
更新日期:2020-09-29 00:00:00
abstract::The selenium levels and the glutathione peroxidase activity GSH-PX of whole blood and of erythrocytes, respectively, were determined in 139 normal Danes and related to sex and smoking habits. No differences were found in relation to sex apart from a higher GSH-PX activity of females when assayed with tertiary butyl hy...
journal_title:Biological trace element research
pub_type: 临床试验,杂志文章
doi:10.1007/BF02990131
更新日期:1988-01-01 00:00:00
abstract::Accumulation of lanthanum oxide nanoparticles (La2O3NPs) in the femur bone of rats after 30 days of oral administration was explored. Also, the influence of La2O3NPs on macro and trace elements in the rats' femur bone was assessed. Inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma op...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-019-01907-z
更新日期:2020-07-01 00:00:00
abstract::Trace element involvement in wounds left to heal by secondary intention needs clarification. We have previously reported faster healing of wounds following acute surgery compared with elective excision of pilonidal sinus disease. The effect of topical zinc on the closure of the excisional wounds was mediocre compared ...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-013-9658-z
更新日期:2013-06-01 00:00:00
abstract::The present study was undertaken to investigate the utility of cystatin C (CysC) as an early biomarker of cadmium (Cd)-induced renal injury. The study was carried out on 50 adult male individuals divided into five groups of 10 individuals as follows: control, welders, smoker welders, diabetic welders, and smoker diabe...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-014-9939-1
更新日期:2014-06-01 00:00:00
abstract::Zinc (Zn) is an essential nutrient that is required in humans and animals for many physiological functions, including immune and antioxidant function, growth, and reproduction. The present study was performed to investigate the effects of three Zn levels, including Zn adequate (35.94 mg/kg, as a control), Zn deficienc...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1385/BTER:107:2:153
更新日期:2005-11-01 00:00:00
abstract::Zinc (Zn) is essential for development, growth, and reproduction. The Mexican government subsidizes micronutrient-fortified milk for risk groups, with positive effect on the targeted groups' plasma Zn level, inferring a good absorption is achieved although it has not being measured. The aim of this study was to determ...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-015-0356-x
更新日期:2015-11-01 00:00:00
abstract::The protective effects of caffeic acid on angiotensin-converting enzyme (ACE) and purinergic enzyme activities, as well as gluconeogenesis was investigated in iron-induced cardiotoxicity. Cardiotoxicity was induced in heart tissues harvested from healthy male SD rats by 0.1 mM FeSO4. Treatment was carried out by co-in...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-020-02227-3
更新日期:2021-03-01 00:00:00
abstract::There are several factors that affected calcium bioavailability, such as physiological and dietary factors. These dietary factors help to achieve an appropiate status of calcium for a correct bone mineralization. In this pathway, recently some compounds present in milk that seem improve calcium absorption such as lact...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1385/BTER:89:1:43
更新日期:2002-10-01 00:00:00
abstract::Iron-deficiency anemia (IDA) is the most common nutritional deficiency in childhood throughout the world. Although it has been shown that IRA is associated with elevated plasma copper and depleted zinc levels in children, there are conflicting results on the effect of iron supplementation on the absorption of these el...
journal_title:Biological trace element research
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1385/BTER:94:1:79
更新日期:2003-07-01 00:00:00
abstract::Being a proven photocatalyst, nano-anatase is capable of undergoing electron transfer reactions under light. In previous studies, we had proven that nano-anatase improved photosynthesis and greatly promoted spinach growth. However, the molecular mechanisms of carbon reaction promoted by nano-anatase are still not clea...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-008-8203-y
更新日期:2008-01-01 00:00:00
abstract::In the present study, spectroscopic determinations of copper ions using chimeric metal-binding green fluorescent protein (His6GFP) as an active indicator have been explored. Supplementation of copper ions to the GFP solution led to a remarkable decrease of fluorescent intensity corresponding to metal concentrations. F...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-009-8476-9
更新日期:2010-06-01 00:00:00
abstract::Cadmium (Cd) pollution and acid rain are the main environmental issues, and they often occur in the same agricultural region. Nevertheless, up to now, little information on the combined pollution of Cd(2+) and acid rain action on crops were presented. Here, we investigated the combined effect of Cd(2+) and acid rain o...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-011-9053-6
更新日期:2011-12-01 00:00:00
abstract::The metabolism of 203Hg-labeled methylmercury chloride (MeHg) has been studied in rabbits and hamsters. Rabbits were administered 1.6 mumols MeHgCl/kg bw intravenously, and hamsters 40 mumols/kg bw orally. Urine and feces were collected daily and groups of four animals killed after 1 h, 1 d, or 7 d. The concentration ...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/BF02917256
更新日期:1989-07-01 00:00:00
abstract::This study was to investigate the alterations of serum copper homeostasis after hypertensive intracerebral hemorrhage (ICH), which is not yet clear. We recruited 85 hypertensive ICH patients and determined their serum levels of total copper (TCu), small molecule copper (SMC), and ceruloplasmin (Cp). Sera from 32 healt...
journal_title:Biological trace element research
pub_type: 杂志文章
doi:10.1007/s12011-017-1227-4
更新日期:2018-09-01 00:00:00