SU485973A1 - Chronopotentiometric method for determining lead in solution - Google Patents
Chronopotentiometric method for determining lead in solutionInfo
- Publication number
- SU485973A1 SU485973A1 SU1962610A SU1962610A SU485973A1 SU 485973 A1 SU485973 A1 SU 485973A1 SU 1962610 A SU1962610 A SU 1962610A SU 1962610 A SU1962610 A SU 1962610A SU 485973 A1 SU485973 A1 SU 485973A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- solution
- lead
- determining
- determining lead
- chronopotentiometric
- Prior art date
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- Investigating And Analyzing Materials By Characteristic Methods (AREA)
Description
1one
Изобретение относитс к электрохимическим способам определени содержани свинца в растворе, а именно к хронопотенциометрии с накоплением, и может быть использовано при анализе состава веществ.The invention relates to electrochemical methods for determining the lead content in a solution, namely to chronopotentiometry with accumulation, and can be used in analyzing the composition of substances.
Известный хронопотенциометрический способ определени содержани металлов в растворе заключаетс в катодном осаждении металла и последующем его анодном растворении при заданном токе с регистрацией времени растворени .The known chronopotentiometric method for determining the content of metals in a solution consists in the cathodic deposition of a metal and its subsequent anodic dissolution at a given current with registration of the time of dissolution.
Цель изобретени - повышение точности и чувствительности анализа при определении содержани свинца.The purpose of the invention is to improve the accuracy and sensitivity of the analysis in determining lead content.
Цель достигаетс тем, что процесс ведут в присутствии эфироспиртов общей формулыThe goal is achieved by the fact that the process is carried out in the presence of ether alcohol of the general formula
R-0-{-CH,-CH,-0-L-H,R-0 - {- CH, -CH, -0-L-H,
где R - алифатический радикал, имеющий атомов углерода и , при их концентрации в растворе, равной или превышающей 7 мг/л.where R is an aliphatic radical having carbon atoms and, at their concentration in solution, equal to or greater than 7 mg / l.
Предлагаемый способ позвол ет вести определение 0,01 мг/л свинца в растворах и природных водах и обеспечивает повышение чувствительности измерений, характеризуемой среднеквадратичным отклонением до величины пор дка 1% за счет устранени искажений хронопотенциограммы и снижени мещающего вли ни примесей органических депол ризаторов.The proposed method allows determination of 0.01 mg / l of lead in solutions and natural waters and provides an increase in measurement sensitivity, characterized by a standard deviation of up to 1% by eliminating the distortion of the chronopotentiograms and reducing the influence of impurities of organic depolarizers.
Пример. В анализируемый раствор, предварительно подкисленный азотной или сол ной кислотой до рН 1,0-1,5, ввод т эфироспирты , например синтанол ДС-10, в количестве 7-700 мг/л и ведут катодное осаждение свинца на ртутный электрод при отрицательном потенциале 0,7+1,0 в относительно насыщепного хлорсеребр ного электрода в течение времени, завис щего от требуемой чувствительности определени . По окончании этой операции выполн ют анодное растворение свинца при посто нном токе и по хронопотенциограмме регистрируют врем растворени . Концентрацию свинца наход т методом добавок.Example. In the analyzed solution, previously acidified with nitric or hydrochloric acid to a pH of 1.0-1.5, ether alcohols, for example, DS-10 synanol, are introduced in an amount of 7-700 mg / l and lead cathode deposition of lead onto the mercury electrode is used at a negative potential. 0.7 + 1.0 volts relative to a saturated chlorine-silver electrode over a period of time depending on the required detection sensitivity. At the end of this operation, lead anodic dissolution is carried out at a constant current and the dissolution time is recorded using a chronopotentiogram. The lead concentration is found by the additive method.
Предмет изобретени Subject invention
Хронопотенциометрический способ определепи свинца в растворе, заключающийс в его катодном осаждении и последующем аподном растворении при заданном токе с регистрацией времени растворени , отличающ и и с тем, что, с целью повышени точности и чувствительности анализа, процесс ведут в присутствии эфироспиртов общей формулыThe chronopotentiometric method of determining lead in solution, consisting in its cathodic deposition and subsequent apodal dissolution at a given current with registration of the dissolution time, is also distinguished by the fact that, in order to improve the accuracy and sensitivity of the analysis, the process is carried out in the presence of ether alcohols of the general formula
R-O-f-CH -CH.-O-In-H, 3 где R - алифатический радикал, имеющий w 4-20 атомов )глерода и , при 4 их концентрации в растворе, равиой или превышающей 7 мг/л.R-O-f-CH-CH.-O-In-H, 3 where R is an aliphatic radical having w 4-20 atoms) hydrochloride and, at 4, its concentration in solution, a rabbi or exceeding 7 mg / l.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1962610A SU485973A1 (en) | 1973-09-17 | 1973-09-17 | Chronopotentiometric method for determining lead in solution |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU1962610A SU485973A1 (en) | 1973-09-17 | 1973-09-17 | Chronopotentiometric method for determining lead in solution |
Publications (1)
Publication Number | Publication Date |
---|---|
SU485973A1 true SU485973A1 (en) | 1975-09-30 |
Family
ID=20565466
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU1962610A SU485973A1 (en) | 1973-09-17 | 1973-09-17 | Chronopotentiometric method for determining lead in solution |
Country Status (1)
Country | Link |
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SU (1) | SU485973A1 (en) |
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1973
- 1973-09-17 SU SU1962610A patent/SU485973A1/en active
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