Methods for determination of iodine in urine and salt

Author(s):  
Pieter L. Jooste ◽  
Emmerentia Strydom
Keyword(s):  
1996 ◽  
Vol 42 (12) ◽  
pp. 2021-2027 ◽  
Author(s):  
Z Yaping ◽  
Y Dongxing ◽  
C Jixiang ◽  
L Tianshiu ◽  
C Huiqin

Abstract A flow-injection technique involving on-line catalytic digestion and spectrophotometric detection has been developed for the determination of iodine in urine. After urine samples are digested by KMnO4-K2Cr2O7-H2SO4 solution, the iodine in the urine catalyzes the reaction of As(III) with Ce(IV). The remaining Ce(IV) is then reacted with brucine and the product is detected with a spectrophotometer at 480 nm. With this technique, we obtained a detection limit for urinary iodine of 0.039 mumol/L, and the linear range was 0.039-7.88 mumol/L with a CV < 3%. Analytical recovery ranged between 92% and 104% (mean 99%). The sampling frequency of the flow-injection technique was 70/h. We applied the method to measure the iodine concentration in a freeze-dried urine reference sample and in collected urine samples, and compared the results with those obtained by the accepted alkaline ashing technique. The proposed technique has the advantages of being simple, rapid, precise, accurate, and sensitive. It can be used to assess iodine-deficient populations as well as those receiving treatment.


The Analyst ◽  
2001 ◽  
Vol 126 (1) ◽  
pp. 121-126 ◽  
Author(s):  
Duangjai Nacapricha ◽  
Saowapha Muangkaew ◽  
Nuanlaor Ratanawimarnwong ◽  
Juwadee Shiowatana ◽  
Kate Grudpan

1965 ◽  
Vol 11 (10) ◽  
pp. 932-936 ◽  
Author(s):  
Joseph Benotti ◽  
Norbert Benotti ◽  
Samuel Pino ◽  
Henry Gardyna

Abstract A method is presented for determination of total iodine in biologic material. The procedure requires a minimum number of reagents, eliminating the possibility of reagent iodine contamination. The actual cost of equipment for this method is less than for others, and the method offers good replication and excellent recovery of added iodine.


2018 ◽  
Vol 5 (3) ◽  
pp. 10-19
Author(s):  
K. G. Kamalov ◽  
E. M. Soltakhanov ◽  
G. A. Gazimagomedov

Purpose. Conducting a comparative analysis and assessment of the dynamics of endemic goiter and iodine deficiency in the population of boys of the Republic of Dagestan at the age of 11–13 years for the period 2002–2013, living in different ecological and geographical zones.Patients and methods. 3457 adolescent boys 11–13 years old, living in different ecological and geographical zones, were surveyed. Methods of investigation were: determination of daily excretion of iodine in urine, palpation and ultrasound examination of the thyroid gland.Results. It was revealed that during the period of preventive measures there was an improvement in iodine supply regardless of the area of residence. However, against the background of preventive measures in the lowland zone, iodine deficiency decreased not evenly, and in some cases the aggravation occured.Conclusion. The incidence of endemic goiter and the severity of iodine deficiency in boys aged 11–13 years in the mountain and foothill ecology and geographical zones of the Republic of Dagestan are generally comparable to those of iodine deficiency and endemic goiter in the general population of the Republic of Dagestan. On a flat ecogeographical zone, endemic goiter in boys 11-13 years is less common than in the general population in this region. Preventive measures to combat iodine deficiency have led to a decrease in the frequency of endemic goiter, but constant monitoring is required. As a result, there was no correlation between the incidence of endemic goiter and the severity of iodine deficiency.


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