Determination of Perfluorooctanesulfonate and Perfluorooctanoic Acid in Maternal and Cord Blood Samples

PIXE technique was applied to the measurement of elements in the placenta, maternal blood and cord blood of human. The elements determined in these samples include Cl , K , Ca , Fe , Cu and Zn . The values obtained by PIXE were compared with those by ICP-AES to test the accuracy of the method. In placental samples, the mean values of K , Fe , Cu and Zn concentrations obtained by the two methods agree, while Ca concentration is lower in PIXE analysis. The values from PIXE, however, show larger variations resulting from inhomogeneity of the placental samples composed of various tissues different in histological functions. In the analysis of blood samples, the results of the two methods agree for Cl , K , Ca , Fe , Cu and Zn , although the standard deviations tend to be larger in PIXE. These results indicate that PIXE is a useful method for the determination of elements in placental and blood samples, although the preparation to homogenize sample is necessary to obtain accurate results.

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A new LC/MS method for specific determination of human systemic exposure to bisphenol A, F and S through their metabolites: Application to cord blood samples

Environment International ◽

10.1016/j.envint.2021.106429 ◽

2021 ◽

Vol 151 ◽

pp. 106429

Author(s):

C.A. Gély ◽

A. Huesca ◽

N. Picard-Hagen ◽

P.L. Toutain ◽

A. Berrebi ◽

...

Keyword(s):

Bisphenol A ◽

Cord Blood ◽

Systemic Exposure ◽

Blood Samples ◽

Specific Determination

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Placental Forms and Zygosity Determination of Twins in Ibadan, Western NigeriaA study of 1475 twin maternities

Acta geneticae medicae et gemellologiae ◽

10.1017/s1120962300024999 ◽

1970 ◽

Vol 19 (1-2) ◽

pp. 49-54 ◽

Cited By ~ 18

Author(s):

P. P. S. Nylander

Keyword(s):

Cord Blood ◽

Histological Examination ◽

Twin Pair ◽

Electrophoretic Pattern ◽

Blood Groups ◽

Gene Frequencies ◽

Blood Samples ◽

Registrar General ◽

Very High

The incidence of twinning in Western Nigeria is very high, being 45‰ (Nylander, 1969a), as compared with 11-12‰ in Caucasian populations (Registrar General, 1967). A recent study of twinning in Ibadan, in which zygosity of individual twin pairs was determined, has shown that the pattern of placentation and zygosity in this population is also very different from that in Caucasian populations.As many as 1475 consecutive newborn twin pairs delivered in three hospitals in Ibadan between March 1967 and April 1969 were investigated.The placentae of the twins were examined macroscopically by the author personally to determine the form (whether single, fused, double or separate) and the membrane relationships (whether monochorionic or dichorionic) as shown in Figs. 1 and 2. The membrane relationship was confirmed by histological examination.Cord blood samples were collected from each twin pair and studied for (1) ABO, Rh (using antisera, C, c, D, E, e), MNSs and Gonzales blood groups and (2) G6PD electrophoretic pattern. Other blood groups like Fya, k and Jk, used initially, were discontinued later, because the gene frequencies in this population are such that they are uninformative for zygosity determination.Samples of the placenta of each twin were sent in refrigerated containers to the Galton Laboratory, London University, for placental enzyme studies — phosphoglucomutase and peptidase (Hopkinson and Harris, 1968; Lewis and Harris, 1967).

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Synthesis and solvatochromic studies of 2- amino-3-phenolazo1-(4-sulfophenyl)-3-methyi-5-pyrozolone and use it for the determination of trace amount of Nickel (II) in blood samples

International Journal of Bioassays ◽

10.21746/ijbio.2016.10.001 ◽

2016 ◽

Vol 5 (10) ◽

pp. 4920

Author(s):

Amar M. Ali ◽

Hussain. J. Mohammed*

Keyword(s):

Stability Constant ◽

Trace Amount ◽

Benzenesulfonic Acid ◽

Determination Method ◽

Blood Samples ◽

Determination Of Nickel ◽

Normal Human ◽

The Stability ◽

Normal Human Blood

A new, simple, sensitive and rapid spectrophotometric method is proposed for the determination of trace amount of Nickel (II). The method is based on the formation of a 1:2 complex with 4-(4-((2-hydroxy-6-nitrophenyl) diazenyl) -3-methyl-5-oxo-2, 5-dihydro-1H-pyrazol-1-yl) benzenesulfonic acid (2-ANASP) as a new reagent is developed. The complex has a maximum absorption at 516 nm and εmax of 1. 84 X 105 L. mol-1. cm-1. A linear correlation (0. 25 – 4. 0μg. ml-1) was found between absorbance at λmax and concentration. The accuracy and reproducibility of the determination method for various known amounts of Nickel (II) were tested. The results obtained are both precise (RSD was 1. 2 %) and accurate (relative error was 0. 787 %). The effect of diverse ions on the determination of Nickel (II) to investigate the selectivity of the method were also studied. The stability constant of the product was 0. 399 X 106 L. mol-1. The proposed method was successfully applied to the analysis of diabetes blood and normal human blood.

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Determination of 19 Psychoactive Substances in Premortem and Postmortem Whole Blood Samples Using Ultra-High-Performance Liquid Chromatography–Tandem Mass Spectrometry

Separations ◽

10.3390/separations8060078 ◽

2021 ◽

Vol 8 (6) ◽

pp. 78

Author(s):

Sevasti Karampela ◽

Jessica Smith ◽

Irene Panderi

Keyword(s):

High Performance Liquid Chromatography ◽

Liquid Chromatography ◽

Formic Acid ◽

Whole Blood ◽

High Performance ◽

Tandem Mass ◽

Psychoactive Substances ◽

Blood Samples ◽

Whole Blood Samples

An ever-increasing need exists within the forensic laboratories to develop analytical processes for the qualitative and quantitative determination of a broad spectrum of new psychoactive substances. Phenylethylamine derivatives are among the major classes of psychoactive substances available on the global market and include both amphetamine analogues and synthetic cathinones. In this work, an ultra-high-performance liquid chromatography-positive ion electrospray ionization tandem mass spectrometric method (UHPLC-ESI-MS/MS) has been developed and fully validated for the determination of 19 psychoactive substances, including nine amphetamine-type stimulants and 10 synthetic cathinone derivatives, in premortem and postmortem whole blood. The assay was based on the use of 1 mL premortem or postmortem whole blood, following solid phase extraction prior to the analysis. The separation was achieved on a Poroshell 120 EC-C18 analytical column with a gradient mobile phase of 0.1% formic acid in acetonitrile and 0.1% formic acid in water in 9 min. The dynamic multiple reaction monitoring used in this work allowed for limit of detection (LOD) and lower limit of quantitation (LOQ) values of 0.5 and 2 ng mL−1, respectively, for all analytes both in premortem and postmortem whole blood samples. A quadratic calibration model was used for the 12 quantitative analytes over the concentration range of 20–2000 ng mL−1, and the method was shown to be precise and accurate both in premortem and postmortem whole blood. The method was applied to the analysis of real cases and proved to be a valuable tool in forensic and clinical toxicology.

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Determination of perfluorooctane sulphonate and perfluorooctanoic acid in seafood and water from Map Ta Phut Industrial Estate area, Thailand

Food Additives & Contaminants Part A ◽

10.1080/19440049.2021.1921281 ◽

2021 ◽

pp. 1-16

Author(s):

Teerapong Lertassavakorn ◽

Nanthanit Pholphana ◽

Nuchanart Rangkadilok ◽

Tawit Suriyo ◽

Jutamaad Satayavivad

Keyword(s):

Perfluorooctanoic Acid ◽

Industrial Estate

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LRF and TRF test during long-term danazol treatment: increase of the LH and FSH responses but decrease of the prolactin and TSH responses

Acta Endocrinologica ◽

10.1530/acta.0.1040001 ◽

1983 ◽

Vol 104 (1) ◽

pp. 1-5 ◽

Cited By ~ 3

Author(s):

J. Leppäluoto ◽

L. Rönnberg ◽

P. Ylöstalo

Keyword(s):

Clinical Symptoms ◽

Follicular Phase ◽

Blood Samples ◽

Hormone Levels ◽

Coefficients Of Variation ◽

The Mean ◽

Thyroid Hormone Levels ◽

Low Serum

Abstract. Seven patients suffering from severe endometriosis were treated with danazol 200 mg × 3 daily for 6 months. Clinical symptoms were alleviated and menses disappeared in response to the treatment. After cessation of the treatment the menstrual bleedings returned in 1–3 months. Blood samples for determination of gonadotrophins, prolactin (Prl), oestradiol (E2), progesterone, thyroid hormones and thyrotrophin in radioimmunoassays were taken and a combined TRF and LRF test carried out in the follicular phase before treatment, at the 6th month of treatment and after reappearance of the first menses. There were no statistically significant changes in the basal levels of serum FSH, LH or TSH during the danazol treatment. Neither was there any change in episodic secretions of FSH, LH or Prl, as determined by the mean coefficients of variation of the hormone levels in seven consecutive samples taken at 20 min intervals. On the other hand, serum E2, Prl and thyroid hormone levels were significantly decreased in the 6th month of treatment. In the TRF-LRF test the responses of serum FSH and LH were significantly higher and those of serum Prl and TSH significantly lower during danazol treatment than before. Prl responses remained lowered after the treatment. It appears that low serum oestrogen levels, induced by the danazol treatment, sensitize the pituitary gonadotrophs to exogenous LRF, but make the sensitivity of thyrotrophs and lactotrophs lower to exogenous TRF. These results thus indicate that danazol does not make the pituitary gonadotrophs insensitive to LRF, but danazol may rather inhibit the secretion of hypothalamic LRF.

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Simultaneous Determination of Cyclosporine A, Tacrolimus, Sirolimus, and Everolimus in Whole-Blood Samples by LC-MS/MS

The Scientific World JOURNAL ◽

10.1100/2012/571201 ◽

2012 ◽

Vol 2012 ◽

pp. 1-8 ◽

Cited By ~ 22

Author(s):

Mustafa Karapirli ◽

Murat Kizilgun ◽

Ozgur Yesilyurt ◽

Husamettin Gul ◽

Zeki Ilker Kunak ◽

...

Keyword(s):

Mass Spectrometry ◽

Tandem Mass Spectrometry ◽

Simultaneous Determination ◽

Cyclosporine A ◽

Whole Blood ◽

Immunosuppressive Drugs ◽

Tandem Mass ◽

Blood Samples ◽

Whole Blood Samples

Objectives. Cyclosporine A (CyA), tacrolimus (TRL), sirolimus (SIR), and everolimus (RAD) are immunosuppressive drugs frequently used in organ transplantation. Our aim was to confirm a robust sensitive and selective liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for determination of CyA, TRL, SIR, and RAD in whole-blood samples.Materials and Methods. We used an integrated online solid-phase extraction-LC-MS/MS system and atmospheric pressure ionization tandem mass spectrometry (API-MS/MS) in the multiple reaction monitoring (MRM) detection mode. CyA, TRL, SIR, and RAD were simultaneously analyzed in whole blood treated with precipitation reagent taken from transplant patients.Results. System performance parameters were suitable for using this method as a high-throughput technique in clinical practice. The high concentration of one analyte in the sample did not affect the concentration of other analytes. Total analytical time was 2.5 min, and retention times of all analytes were shorter than 2 minutes.Conclusion. This LC-MS/MS method can be preferable for therapeutic drug monitoring of these immunosuppressive drugs (CyA, TRL, SRL, and RAD) in whole blood. Sample preparation was too short and simple in this method, and it permits robust, rapid, sensitive, selective, and simultaneous determination of these drugs.

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