Soil active state heavy metal mercury detection chelate extractant and preparation method thereof

The invention discloses a soil active state heavy metal mercury detection chelate extractant and a preparation method thereof. The method comprises steps of sample pretreatment and chelate extractantpreparation. Firstly, a test solution is prepared through alkaline hydrolysis, acid extraction, centr...

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Bibliographic Details
Main Authors CHEN LONG, SHEN LIANG, HE YUEYUN
Format Patent
LanguageChinese
English
Published 02.07.2019
Subjects
INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES
MEASURING
PERFORMING OPERATIONS
PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
PHYSICS
SEPARATION
TESTING
TRANSPORTING
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Summary:The invention discloses a soil active state heavy metal mercury detection chelate extractant and a preparation method thereof. The method comprises steps of sample pretreatment and chelate extractantpreparation. Firstly, a test solution is prepared through alkaline hydrolysis, acid extraction, centrifugation, concentration, microfiltration and constant volume; the chelate extractant is then prepared, 1.967 g of diethylenetriamine pentaacetic acid is dissolved in 14.92 g (about 13.3 mL) of triethanolamine and a small amount of water, 1.47 g of calcium chloride is then dissolved in water and together transferred to a 1000 mL volumetric flask, water is added to about 950 mL, the pH is adjusted to 7.3 with a 1:1 hydrochloric acid solution or 1:1 ammonia water on an acidimeter, and the volumeis adjusted to be 1000 m with water; and in the chelate extractant, calcium ions of calcium chloride are used as a soil active state mercury detection chelate extraction equilibrium catalyst, 20.00 gof the sample is weighed, 4
Bibliography:Application Number: CN201711425840