Water-sensitive paste to determine the boundaries of the water with oil products
(57) Abstract:Use: in analytical chemistry. The inventive paste containing phenolphthalein, trisodium phosphate, castor oil and Kalinovo clay, impose additional indicator bromophenol blue and silver nitrate in the following ratio, wt. phenolphthalein 1,0 2,0; trinacria phosphate 10,0 - 20,0; castor oil 20,0 30,0; bromophenol blue 0,01 0,05; silver nitrate 0,05 0,2; kaolin clay rest. table 1. The invention relates to the production of water-sensitive pastes and can be used to determine the boundary between oil and water reservoirs, tanks, marine tankers, various courts, settling wastewater treatment plants factories, where it is necessary to regularly monitor the level of oil and water.To determine the level of water in petroleum products are water-sensitive paste. Known water-sensitive composition paste comprising a binder, an indicator, and fillers  However, this structure does not provide a clear indication washed off the light fraction hydrocarbons, and petroleum products having an acid reaction, gives false testimony.brilliant green and a filler tooth powder or chalk  However, this pasta does not provide a clear indication on the border between oil and water, especially at low temperatures.Closest to the proposed water-sensitive paste to the technical essence and the achieved result is water-sensitive paste containing the following components, wt.  Phenolphthalein 1,0-2,0 trisodium phosphate 10,0-20,0 Castor oil 20,0-30,0 Kaolin clay is the Rest
This pasta is sensitive enough to indicate the boundaries of water, oil, stable during prolonged storage, suitable for multiple use. However, the paste is sensitive only to the display of plain water and does not react to the qualitative content of the salt (sea) water. In practice, in the process operation of various vessels, transportation of oil and oil products tankers it is important to know what kind of water quality composition is in the fuel tanks, vessels, tanks of tankers.The invention is directed to expand the scope of water-sensitive paste, while one and the same part of assessing not only the quantity but also the quality of the estimated water (it belongs to fresh or salt). The solution to this problem is achieved by the water-sensitive paste containing phenolphthalein, trisodium phosphate, is brough in the following ratio listed components wt. Phenolphthalein 1,0-2,0 trisodium phosphate 10,0-20,0 Castor oil 20,0-30,0 Bromophenol blue 0.01 to 0.05 silver Nitrate 0,05-0,2 Kaolin clay the Rest.Comparative analysis of the prototype allows us to conclude that the claimed composition of the water-sensitive paste differs from the known to the introduction of new components, namely indicator bromophenol blue and of silver nitrate titrant, therefore, the proposed solution has novelty.The proposed water-sensitive paste allows to evaluate not only the amount of water, but its quality with graduation on fresh and salt, which do not provide the known analogues water-sensitive pastes. Therefore, the proposed solution involves an inventive step.Newly introduced components are non-deficient substances, with industrial production technology. Each of them has its own purpose.Indicator bromophenol blue is issued by the industry that THE 6-09-3719-74, adsorption is an effective indicator for chlorine ions that form the basis of compounds included in the composition of the salt (sea) water. At the same time his action shows the form of silver ions, i.e. when reaching the equivalence point, the indicator changes its color. Therefore, as compounds containing silver ions, used the compound silver nitrate.Thus, the proposed water-sensitive paste contains two indicator: phenolphthalein, which is triggered by the availability of fresh water, and in the presence of chlorine ions in the water, i.e. salt water, additionally shows the action of the indicator bromophenol blue, resulting in the surface of the paste in the first case is painted in crimson, and in the presence of salt water in light grey color the exact level of water in the oil. Thus, along with high sensitivity toothpaste to indicate water in the oil is achieved universality of its validity.Water-sensitive paste is prepared as follows. Consistently mix the phenolphthalein indicator bromophenol blue and silver nitrate, previously pounded to powder. To the resulting mixture of trisodium phosphate, crushed to a powder, and kaolin clay. The resulting mixture was thoroughly mixed, then add castor oil with continuous thorough mixing of the su light blue color.To study the optimal composition of the paste and the concentrations of its constituent components was prepared 5 formulations of the inventive water-sensitive paste. Composition of the formulations and the results of the evaluation of the effectiveness of their actions in comparison with pasta-the prototype are presented in the table. Analysis of the tabular data shows that of the 5 recipes 3 (2, 3, 4) showed the best results that served as the basis for determining the optimal concentration limits of ingredients included in the composition of the paste.Water-sensitive paste is applied in a thin layer (0.2-0.3 mm) at any measuring tools (tape measure, test - obornik, ruler, metrostar) and put on 15-20 in a container of oil, where it is assumed the presence of water. If the tank is water, the paste changes its color the exact water level: fresh from light blue to raspberry, salted water with a light blue on light gray. Consumption of pasta in one measurement is 0.3 to 0.4, 10-12 min pasta takes the original color and can be reused.Thus, from the analysis of the material presented, it follows that the proposed solution has compared to the prototype novelty, sriti the scope of water-sensitive paste and reduce the range of the applied pastes;
to reduce the consumption of water-sensitive pastes due to the universality of action and high sensitivity of the proposed paste;
to ensure the quality control of any designated water in petroleum products. Water-sensitive PASTE TO determine the BOUNDARIES of the WATER WITH PETROLEUM products, including phenolphthalein, trisodium phosphate, castor oil and kaolin clay, characterized in that it further comprises indicator bromophenol blue and silver nitrate in the following ratio, wt.Phenolphthalein 1,0 2,0
Trisodium phosphate 10,0 20,0
Castor oil 20,0 30,0
Bromophenol blue 0,01 0,05
Silver nitrate 0,05 0,2
Kaolin clay is the Rest
FIELD: analytical methods.
SUBSTANCE: group of inventions is directed on detecting and quantitatively determining hydrogen radicals present in water or in aqueous solution and is characterized by adding sodium 3,5-dibromo-4-nitrosobenzenesulfonate to sample to detect hydrogen radicals from coloration appearing as a result of their absorption characteristics, and additionally characterized by blowing gaseous hydrogen through 1,1-diphenyl-2-picrylhydrazide solution absorbing near 517 nm and sodium 3,5-dibromo-4-nitrosobenzenesulfonate solution at constant velocity in presence of platinum black in order to quantitatively evaluate hydrogen radical concentration using calibration curve based on correlation between coefficient of absorption near 450 nm for azo compound of sodium 3,5-dibromo-4-nitrosobenzenesulfonate and concentration of hydrogen radicals appeared.
EFFECT: increased determination accuracy and enabled analysis of hydrogen radicals in various media.
6 cl, 15 dwg, 1 tbl, 5 ex
FIELD: analytical methods in environmental monitoring.
SUBSTANCE: method comprises: sampling, acidifying samples with HCl/H2SO4 mixture, adding Ce(SO4)2 as oxidant and removing its excess with reducing agent NH2OH·HCl, adding rhodamine C as organic reagent, extracting resulting complex, separating organic phase from aqueous phase, and measuring optical density. Extraction is performed with carbon tetrachloride/methyl isobutyl ketone mixture at 5:1 volume ratio and extractant-to-sample volume ratio 1:1 under dynamic conditions by way of washing away complex with extractant. Content of antimony is judged of from difference of optical densities of extractant and mixture.
EFFECT: lowered measurement threshold to values comparable with allowable limits, increased reliability, reduced analysis time, and automated analytical procedure.
3 cl, 1 dwg, 3 tbl, 3 ex
FIELD: organic chemistry, chemical technology.
SUBSTANCE: invention relates to preparing analytical reagents eliciting selectivity and high sensitivity with respect to transient metal cations. Method involves interaction of 2-hydroxythiobenzoyl hydrazone with aromatic aldehydes that results to synthesis of 2-(2'-hydroxyphenyl)-5-(R'-phenyl)-1,3,4-thiadiazolines-2 that have been tested as analytical reagents with metal cation salts of s-, p- and d-elements. Obtained results of investigations have been applied for analysis of medicinal agents containing transient metal cations. Invention provides expanding assortment of analytical reagents used for detection of metal cations of s-, p- and d-elements that can be used in analytical, pharmaceutical and chemical-toxicological practice.
EFFECT: valuable properties of reagents.
1 cl, 2 tbl, 3 ex
FIELD: pharmaceutical chemistry.
SUBSTANCE: the present innovation deals with identifying isoniazide, pyridine derivative, applied to control the quality of production manufactured by pharmaceutical enterprises and prepared by drug stores. One should detect by treating the sample under investigation with freshly prepared 10%-hydroxylamine hydrochloride alkaline solution at obtaining the color. The method creates minimal duration for detection.
EFFECT: higher sensitivity and specificity of the method.
1 ex, 2 tbl
FIELD: analytic chemistry (indicating compositions).
SUBSTANCE: claimed composition contains (mass %): sorbent (anionite, modified with organic reagent) 0.4; hydrochloric acid 0.0011-0.0015; and balance: water. Composition of present invention is useful in determination of Mo(VI) content in natural water and wastewater.
EFFECT: improved sensitivity, increased analysis velocity and decreased effort.
FIELD: analytical chemistry of elements.
SUBSTANCE: the invention is pertaining to the field of analytical chemistry of elements, in particular, to methods of detection of silver availability, that may be used at detection of silver availability in the natural waters and technological solutions. The method of detection of silver availability provides for preparation of a silver solution (1), its transformation into a complex compound and measurement of the luminescent emission intensity. Silver is separated from solutions using a silica gel chemically modified with the help of mercaptogroups and intensity of the silver complex compound luminescent emission (1) is measured with the help of mercaptogroups on the surface of silica gel at 77К at ultraviolet irradiation light. The technical result is simplification of the technological process, decrease of a relative limit of detection, extension of the range of defined concentrations.
EFFECT: the invention ensures simplification of the technological process, decrease of a relative limit of detection, extension of the range of defined concentrations.
FIELD: analytical methods.
SUBSTANCE: indicator composition, which is used two-step analytical procedure, contains 0.6% anionite AN-31 in sulfate form (as sorbent), 0.05% 4-(2-pyridylazo)resorcinol (reagent), 0.098-0.1% sulfuric acid as pH-creating reagent in the first step, which is neutralized in the second step with excess (0.0035-0.004%) aqueous ammonia to pH 9. Method can be, in particular, used for assaying waste waters and industrial solutions.
EFFECT: enabled joint determination of the two ions, improved selectivity of analysis, and accelerated analytical procedure.
FIELD: analytical chemistry.
SUBSTANCE: method can be used for determining content of bismuth in copper-based alloys. Bismuth solution (III) is prepared, transferred into complex compound and diffuse reflection factor is measured. Bismuth is selected due to transferring it into complex compound from 0,5-3 M solution of hydrochloric acid by means of sorbent - silica, chemically modified N-allyl-N'-propylthiocarbamide. Diffuse reflection factor of bismuth (iii) complex is measured when taking N-allyl-N'-propylthiocarbamide on the surface of silica.
EFFECT: simplified procedure of measurement; widened range of concentrations to me measured.
4 ex, 1 tbl
FIELD: analytical chemistry, indicating composition for gold (iii) assay in aqueous solutions, in particular in waste water and processing solutions.
SUBSTANCE: claimed composition contains (mass %): anionite as sorbent 0.8; hydrochloric acid 5.8; tin(II) chloride 0.8 and balance: water. Method of present invention makes it possible to detect Au(III) in acidic solutions (pH<2).
EFFECT: method with improved sensitivity and selectivity.
FIELD: analytical methods.
SUBSTANCE: in indicator composition for determining manganese(II), in particular, in waste waters and production solutions, containing 0.6% of sorbent, 0.05% of reagent, medium pH adjusting substance, and water, said sorbent is sulfate-form anionite (AN-31), said reagent is 4-(2-pyridylazo)resorcinol, and pH of medium is adjusted with 0.0035-0.004% of ammonia. Concentration of Mn2+ ions is measured spectrophotometrically in presence of above-defined indicator.
EFFECT: increased determination selectivity and accelerated analytical procedure.