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[ 22 ] 熊晓红 . 火焰原子吸收法测定磷矿石、 磷酸中铬[ J ] . 云南 ZENGSHJ.Determinationofchromiuminferrochromi-
化工, 2015 ( 5 ): 32-35. umb yp otassiump erman g anateoxidation-ferroustitration
XIONG X H.Flameatomicabsor p tions p ectrometr yfor method [ J ] .MetalMine , 1996 ( 5 ): 52-53.
[ 24 ] 唐华应 . 碱性高锰酸钾氧化滴定法测定铬含量[ J ] . 四川冶
determinationofchromiuminp hos p haterockandp hos-
p horicacid [ J ] .YunnanChemicalTechnolo gy , 2015 ( 5 ): 金, 1996 ( 2 ): 76-77.
32-35. TANG H Y.Determinationofchromiumcontentb yalka-
[ 23 ] 曾申进 . 高 锰 酸 钾 氧 化 - 亚 铁 滴 定 法 测 定 铬 铁 中 铬[ J ] . linep otassium p erman g anateoxidationtitration method
金属矿山, 1996 ( 5 ): 52-53. [ J ] .Metallur gyo fSichuan , 1996 ( 2 ): 76-77.

DeterminationofDifferentAcidDissolvin g S y stems

ofChromiuminBentoniteforFeed

1 2
LU MeiandLIHon g
( 1.ShaanxiProvincialA g riculturalIns p ectionandTestin gCenter , Xi ’ an 710003 , China ;
2.ShaanxiProvincialAnimalHusbandr yTechnolo gyExtensionStation , Xi ’ an 710016 , China )

6+
Abstract Chromium ( Cr ) isinducementofg enemutationandlun gcancer.Inordertoaccuratel y
,
,
g
determinethecontentofchromiuminfeed , uidehealth ybreedin g ensureanimalfoodsafet y and
reduceenvironmental p ollution , itisanur g entforustoeffectivel ydissolveinsolublematterssuchas
chromiumtrioxideandchromiumsulfateinfeedadditives , andtoovercomelowchromiumindetermi-
nationresults.Intheex p eriment , sam p lesofbentoniteforfeed wereselected , andthree methods
wereusedforsam p lep retreatment , namel y roomtem p eraturedissolutions y stemofnitricacid , ther-
maldissolutions y stemofh y drochloricacid , andthermaldissolutions y stemofh y drochloricacid- p o-
tassiumbromatesolution.Thechromiumcontentwasdeterminedb y flameatomicabsor p tions p ectro-
p hotometerandthenwasanal y zed.Theeffectsofthreetreatments y stemsonthedeterminationre-
sultsofchromiuminbentoniteforfeedwerecom p ared , andthehotdissolutions y stemofh y drochloric
acid- p otassiumbromatesolutionwasselected , andtheconditionswereo p timizedandthemethodolo gy
wasinvesti g ated.Thetestresultsshowedthattheextractionrateofchromiuminhotdissolutions y s-
temoftheh y drochloricacid- p otassiumbromatesolutionwas94.02%and31.81% hi g herthanthatin
theroomtem p eraturedissolutions y stemofnitricacidandhotdissolutions y stemoftheh y drochloric
;
(
acid , res p ectivel yP<0.05 ), andthemethodhadahi g hextractionrateandg oodstabilit y underthe
o p timalcondition , themethodrecover yratewasover98% , therelativestandarddeviationwasless
than4% , andthemethodhadhi g haccurac yandp recision.
Ke ywords Feed ; Bentonite ; Chromiumcontent ; Determination

Received 2021-05-12 Returned 2021-06-09
Foundationitem Pro j ectofthe3rdBatchofRecommended NationalStandardsPlanin2019 ( No.
20193214-T-469 ) .
Firstauthor LU Mei , female , seniorveterinarian.Researcharea : ualit y ins p ectionandmonitorin gof
q
veterinar ydru g s , feedandrelateda g ricultural p roducts.E-mail : 422592999@ qq .com
,
Corres p ondin g author LIHon g male , seniorlivestockbreeder.Researcharea : ualit yandsafet y in-
q
s p ectionoffeedandlivestockp roducts , laborator ymana g ement.E-mail : lihon g -1999@163.com
( 责任编辑: 郭柏寿 Res p onsibleeditor : GUOBaishou )