Interferences in colorimetric determination of silica in hydrofluoric acid digests

Muhammad Sadiq; Hasan Al-Muhanna; Ibrahim Alam

doi:10.1080/00103628809368046

Interferences in colorimetric determination of silica in hydrofluoric acid digests

Muhammad Sadiq, Hasan Al-Muhanna, Ibrahim Alam

King Fahd University of Petroleum & Minerals

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

Soil and sediment samples were digested in HF and Si was determined by the ammonium molybdate-oxalic acid procedure. Results were compared with three Standard Reference Materials from the United States Bureau of Standards. It was found that more than 0.05 % HF in the digests significantly suppresses Si color development. The ratio Si/Fe was more important than absolute Fe concentrations, and Si/Fe below 1 intensified Si color development. It is recommended that HF and Si/Fe should be maintained at below 0.05 % and 1, respectively.

Original language	English
Pages (from-to)	1693-1699
Number of pages	7
Journal	Communications in Soil Science and Plant Analysis
Volume	19
Issue number	15
DOIs	https://doi.org/10.1080/00103628809368046
State	Published - 1 Nov 1988

Keywords

color suppression
fluoride interference
iron interference
sediment
soil

ASJC Scopus subject areas

Agronomy and Crop Science
Soil Science

Access to Document

10.1080/00103628809368046

Cite this

@article{d27074ecaaf4476f859192ff22262265,

title = "Interferences in colorimetric determination of silica in hydrofluoric acid digests",

abstract = "Soil and sediment samples were digested in HF and Si was determined by the ammonium molybdate-oxalic acid procedure. Results were compared with three Standard Reference Materials from the United States Bureau of Standards. It was found that more than 0.05 \% HF in the digests significantly suppresses Si color development. The ratio Si/Fe was more important than absolute Fe concentrations, and Si/Fe below 1 intensified Si color development. It is recommended that HF and Si/Fe should be maintained at below 0.05 \% and 1, respectively.",

keywords = "color suppression, fluoride interference, iron interference, sediment, soil",

author = "Muhammad Sadiq and Hasan Al-Muhanna and Ibrahim Alam",

year = "1988",

month = nov,

day = "1",

doi = "10.1080/00103628809368046",

language = "English",

volume = "19",

pages = "1693--1699",

journal = "Communications in Soil Science and Plant Analysis",

issn = "0010-3624",

publisher = "Taylor and Francis Ltd.",

number = "15",

}

TY - JOUR

T1 - Interferences in colorimetric determination of silica in hydrofluoric acid digests

AU - Sadiq, Muhammad

AU - Al-Muhanna, Hasan

AU - Alam, Ibrahim

PY - 1988/11/1

Y1 - 1988/11/1

N2 - Soil and sediment samples were digested in HF and Si was determined by the ammonium molybdate-oxalic acid procedure. Results were compared with three Standard Reference Materials from the United States Bureau of Standards. It was found that more than 0.05 % HF in the digests significantly suppresses Si color development. The ratio Si/Fe was more important than absolute Fe concentrations, and Si/Fe below 1 intensified Si color development. It is recommended that HF and Si/Fe should be maintained at below 0.05 % and 1, respectively.

AB - Soil and sediment samples were digested in HF and Si was determined by the ammonium molybdate-oxalic acid procedure. Results were compared with three Standard Reference Materials from the United States Bureau of Standards. It was found that more than 0.05 % HF in the digests significantly suppresses Si color development. The ratio Si/Fe was more important than absolute Fe concentrations, and Si/Fe below 1 intensified Si color development. It is recommended that HF and Si/Fe should be maintained at below 0.05 % and 1, respectively.

KW - color suppression

KW - fluoride interference

KW - iron interference

KW - sediment

KW - soil

UR - https://www.scopus.com/pages/publications/77957036060

U2 - 10.1080/00103628809368046

DO - 10.1080/00103628809368046

M3 - Article

AN - SCOPUS:77957036060

SN - 0010-3624

VL - 19

SP - 1693

EP - 1699

JO - Communications in Soil Science and Plant Analysis

JF - Communications in Soil Science and Plant Analysis

IS - 15

ER -

Interferences in colorimetric determination of silica in hydrofluoric acid digests

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Fingerprint

Cite this